So basically, the rollers perform the same function in a cvt that sprockets perform on a chain-driven bike. Lowering or raising the tooth count of the sprockets on the bike won't give you "more" top speed or acceleration, it will simply work differently with the engine/rpm band and you'll trade one for the other, depending on gearing. Different weight rollers will keep you in a certain 'gear' longer or shorter as your engine revs. Which is 'better' is dependent on how you ride the bike and where your engine likes to operate.
Incredibly well stated. That is exactly what the variator does. If it's viewed as this analogy it should be thought of as a person with the ability to exert X amount of force to the bicycle crank at a range of rpm. The same work being done viewed as calories expended and muscle worked\torn. Hypothetically a person can pedal faster with less force to get to and maintain 20mph or pedal slower with more force to achieve the same result. Operating in a reasonable range of the ability of the person\powerplant\ engine, it will end up at the same top speed eventually as long as the parameters are within a good range of specification.
15,000rpm if your turning those kind of numbers your not gonna watch this for advise you are spot on as to light weights shift at high rpm and heavy shift quicker what makes the decision is how much weight are you hauling off the line
A light rider, say 110 lbs.. heavy or light weights? I actually wanna make my 150cc scooter Slower Less Powerful to learn on. Perhaps I should have started with a 50cc but I didn't have that option.
good explaination.. people forget that the variator spin on the crankle.. modifing weights and change with a more performance variator is equal to lightening a flywheel. higher rpm without a correct calculation isn't a good choice, risk of overspeed is dangerous. remember.. at high rpm the torque.. decrease.
I installed some sliders 11g with a racing variator , i found i accelerated much quicker and got to 46mph pretty fast, however i do now find that i struggle to get to 57mph which is what i got on stock, but i think it is because i have a lighter weighted variator and the rollers are now sliders producing better acceleration at the cost of top end speed.
I have a jog90 variator on my Keeway scooter with a 70 cc malossi set up. The clutch is original. Malossi wild Lion exhaust. I had tried 4 gram and 5 grams weights. also a mix of 3.5 gram with 4 gram. still the scooter had a slow take off. When I switched to full 3,5 gram weights everything changed. fast take off. Good speed. 80km/h. I think i can higher topspeed. So, lighter weights with a heavy variator can mae a difference
the roller weights that are put in as stock are a compromise , you don't necessarily want a scoot that instantly shoots up to 8k rpm ( peak power) as soon as you fart on the throttle when trying to cruise along At 50 mph an a straight road or through town on a slightly open throttle lol.Its fine if you want that sort of performance ( I know some will)but most that think they do probably don't when they are trying to commute into work in the rain !. Not meaning to be a killjoy just saying think about what you want to achieve before you go fiddling and end up with undoubtedly a faster scoot but maybe one thats crap for day to day use. I can never understand why people think putting heavier weights in the variator gives better top speed it can only ever close up so far and unless you put stupidity low weights in it or you fit a spring that is way too strong it will always close up as far as it will go giving the same top speed.
actually there is another factor (RPM) regardless of pulley belt travel, as the belt reach the top of the pulley the bike will now accelerate as the engine RPM increases lets say if you put heavy roller and your belt tops out at 7000rpm and it cannot go anymore faster but when you put lighter rollers your belt tops at 8000rpm and the engine produces a bit more power at such rpm the top speed will slowly creep up together with the rpm a 500 rpm increase at top belt travel could mean 10-20km/h more speed
i have pcx 160cc engine. peak at 15.8HP at 8500rpm. it has bigger engine but also heavier bike. at 131kg. with fuel 8.1liter. and oil etc. it will be closer to 140kg. make power to weight ratio even worst. it has 19gr roller. i think it pretty much self explanatory. very smooth acceleration but also quite a heavy drag. ill try 17gr roller soon.
thank you so much i was gonna buy lighter weights (im actually a biker never ridden a scooter) but i just wanted to check if you had any videos and you did and i figured out i need heavier weights
Went through all the comments and I am still confused. I don't care about top speed (it is limited to 25km/h anyway). My used scooter revs very high before the stock clutch grips and start moving. I want the clutch to grip at lower rpm for low speed cruising/traffic. Do I need to go for heavier or lighter weight rollers?
Hi @2stroke stuffing, I hope you read this. Would you recommend keeping the variator at peak horse power rpm, at peak torque rpm, or perhaps somewhere in the middle? Love the video by the way. No blabla, but short and to the point. Cheers!
This is very confusing to the every day rider and the way it was explained is also very confusing. Most scooters come with heavier weights in order to maximize fuel economy and engine longevity. So by default they come with the wrong slider/roller weight. So if you change them to lighter weights you will put the engine in it's power band sooner and you will definitely get quicker acceleration. This video does nothing but confuse people and it should have been much longer with better explanation.
Moped povlači dobro iz mesta. Međutim, ubrzavanje dugo traje. Takođe, da bih ubrzavao, stalno moram da dajem pun gas. Šta treba da uradim da bih mogao dostignutu brzinu da održavam na nižim obrtajima?
A good day sir, can you help or what will you recomend weight of the ball for may honda adv150? I use 1200rpm center spring and 1000rpm for clutch spring, my weight is 58kilos!!! Thanks in advanve for your help
My bike is really slow to pick up revs up to around 15-20mph, and then it pulls ok revs fine, is this weights/drivetrain servicing related? Thanks in advance
@@nanzansarcade You will get low low end torque as the wheel will start moving early at very low rpm but good for efficiency in traffic as you can then set your idle rpm to very low if your engine doesn't stall when running decently hot.
I got a rebuild kit w little bit heavier weights & I put them in. The engine was constantly winding out, too high rpm before catching, not using ANY of the lower rpms, very annoying. I put the stock lighter weights in & it was much better use of low & high rpms. So the heavy weights made it rev all the time. Yerf dog 150cc
5 лет назад+1
i don't want a fast scooter. i just want a high accelerated scooter. without compromising my fuel. what grams should i use ? - any suggestion ?
OK I was running 6.5g in my scooter 49cc with a big bore 100cc kit could not get it over 40. I put 8.5 in it that came with my kit and now I am hitting 46miles why is that ?
So basically lighter weight make ur bike launch faster and heavy weight give top speed. He said that isnt how it works but he explained it that way? So im confused.
hi, my 100cc Bali can't go into high rpm when I am standing on an uphill slope. It drivers too slow for at least 20m. I used lighter weights but, the problem persists. As soon as I get higher rpm, the the engine and variator run ok. Don't now how to solve this.
Whan you upgrade to a big bore kit does this change the power band drastically or or will it be relatively close to the same as the powerband when the bike was stock? I have been tuning my scooter with an 80cc bbk on it and it's been tough to decide on what sliders to use in my Dr pulley variator. With 6gm sliders I can reach 8000 rpms downhill and with 6.5gm I hit Max of 7400 rpm. What rpm would you say is to high and most likely skipping over the power band for a 139 qmb 50cc 4stroke? Any input would be greatly appreciated Thanks in advance.
I put in 20 gram rollers , no other changes at this time . I do want totry Dr. Pully sliders at 20 grams . Maybe I will need a bit bigger spring on the rear variator . One step at a time . For racing ? No ,for normal use and pulling a cargo trailer .
I bought weights from my Vespa dealer. I put them in and my bike is slow going up hill. I can't remember what colour they are. Yellow or green. I think I took out yellow ones and put in new green ones. I want to replace them, but don't want to get the wrong ones again. I have a 2014 primavera 125. I thought the new weights felt a little heavier, than the old ones, but I'm not sure which Colour the new ones were, only that they are green or yellow?
Hello I'm from Greece I have a sym symphony sr 150... I put the tech pulley flying rollers 2..10gr as the original weight but I haven't see any difference... Why is that? All the people I ask before buy the thech pulley rollers they said to me that the performance will improve...
In gearless scooters, should we apply little bit of grease on round shaped rollers and roller-grooves in variator for smooth spinning of rollers in variator? Or will it make more issues after some time like dust deposit, sides of rollers get flat faster, vibrations will increase etc ? Please tell what should we do with proper reason.
Maybe, grease is OK to use in racing or other scenarios where the variator will be cleaned frequently and the dust isn't allowed to accumulate. The belt produces a fine dust as it wears. Grease will attract and cause a build up of belt dust in the variator ramps over time.
Hey there senpai. I got 50cc scooter. Ive put 3x10g roller & 3x9 roller on a big torque drive. Suddenly ive got 53kmh tops speed. Ive used 1500 rpm spring. How can i choose right wieght for that kind of setup.. Thnks in advance senpai
Please elaborate on what you mean at 1:10 when you say 'keep the rpm at peak power while the bike is variating". In your example, you use 15,000 rpm so does that mean the bike shifts when that rpm is reached? How can you identify when the bike shifts with a CVT transmission? Thanks
im probably a little bit too late and you know this stuff already. But what i have learned the variator starts to change the gear ratio for example at 15,000rpm (which isnt quite realistic) or where ever your bike makes the most power and it keeps the RPM constant through the range until it hits the maxium "gear ratio" where the belt is in its outer edge at primary variator and at inner edge in the secondary variator. Cvt doesnt shift like a regular transmission so it doesnt have those noticeable rpm drops when it "shifts" but it changes gear ratio when the rpm in trying to get over the limit set by the rollers and contra spring. You cant really tell when the variator "shifts" because it has an infinite amount of possible gear ratios and its so smooth because of that. Its possible that i got something wrong.
Hey there, I am new to most of this. How do you approach figuring out what your machines peak RPM is, and then further matching the weights to achieve that?
A channel named FIFTYmil is spreading this false information, just because he achieved better results at lighter weights he concluded it is better for scooters to have lighter weight.
@@2STROKESTUFFINGactually it still can top out as it just takes more RPM to create that centrifugal force ,my crazy friends tried removing 2 roller weights in a 6 roller setup, only 4 was installed and the lazy scoot transformed into an rpm monster with loads of acceleration i marked the pulley and the belt still tops out the rpm went up from lazy 8000 to 10000, 4 stroke scoot
I don't remember if my scooter had light or heavy rollers put in. But 2 months ago I had my 49cc scooter upgraded to a 110cc, but before I was able to reach 50+mph going downhill but only 35 on flat ground. Now with this engine I can only go 45mph on flat ground and downhill, and just over 30 uphill. Do I have light or heavy rollers?
You have heavier rollers that do not accommodate your engine upgrade. Experiment with lighter rollers to boost your engine RPM and keep the engine within desired power-band. Thanks.
My experience regarding upgrading scooters the bigger the engine upgrade the lighter the rollers and stiffer the contra spring, it just produces so much power and so fast that the roller weight shift up the variator too soon actually making the bike slower than stock
my 2019 burgman 400 has the same top speed with 14gr rollers and 20gr rollers...140km at same rpm 8500 i can not understand why it happening...what can i do to improve it...Thank you very much in advice
How would I go about finding the RPMs of my scooter? I'm new to this all and feel lost at times. What are some recommendations for increasing overall top speed? I can get my scooter up to 35 mph; however, I would like to reach 50/55 mph. Any website or channel recommendations for beginners?
Buy a small engine tach. You can change top end by installing a 2 tooth bigger gear on the engine AND OR 2 teeth LESS on rear gear. Try Rolling Wrench garage on youtube
@@jamesbeason9256 Why do you call Rolling Wrench Garbage? I assume you are speaking of his gear ration upgrade kit. That coupled with the Reveno clutch he claims his bikes do 100 mph.
@@denmar355 So he Did. I must have been Really stoned that night. Can you spare a dollar, I haven't eaten in 3 days since I stole this guys cell phone and dead hooker. ( I used the one that worked)
Hi bro i have 155cc scooter with max torque of 13.8 N.m @ 6,250 rpm and max power of 11.1kW / 8,000 rpm. What is the best roller weight to have better top speed??
Problem is i dont have rpm gauge so i dont know if my weights are good or not, or where my engine power îs the highest, for exemple at a carburetor engine, does it have like a cutfuel at certain rpm or it just keeps reving untill it destroy itself?
Hello thanks for the information its very helpful and informative, if you have time I have a few questions about the torque driver and I would like to know if you can help?
Hi , what would you suggest for me , I have Kymco Downtown 125i, stock weights are 12gr . I got Polini Variator with 9gr and 11.8gr. and I did the combination of 3x9gr and 3x11.8. I notice improvements in acceleration but not end speed , this actually decreased. This scooter gets peak power 11KW at 7350rpm . I ordered 10.4 gr and 13.2 gr polini weights to try out that combo and see , but doyou have any suggestions? Thanks
my bike "is stuck" sometimes on 50km/H it will have to go over 55km/h and aftger 55 it accelerate like a madman to 70-75km/h .. im throwing my 17,5mm carb on i just have the 12mm original now on my 70cc cylinder... tried heavy rollers and it did 80km/h but way to slow acceleration. i had 7gram when it did 80, and now i have 6.5 i think
CVT transmissions are obnoxious.. Put a performance clutch, weights, and pulley on all you wan't it's not going change the ratio and loss from clutch, and they also wear out quick.. Flat weights, worn springs, and worn belt are so common there is a hot market do to all the chinese stuff that uses CVT
I changed 5,5g rollers for my chinese 50cc (gy6 engine) and now from standing start the engine revs quite high before the transmission "catches" and then the rpm gets lower and rises gradually as speed increases. This revving didn't happen with the old rollers but the RPM just increased logically from standing start. Now my question is: could this revving start cause damage to the belt/clutch or the cones so should I get slightly heavier rollers?
I have a Vario scooter ( 150cc ) Maximum capacity 9.7kW at 8500rpm Maximum torque 13.4Nm at 5000rpm According to your instructions, if you want the scooter to accelerate quickly, you have to put the roller (lightly) to increase the engine rpm, right? Then the amount of RPM allowed to increase ranges from 5000-8500RPM so can i use the roller (light) to increase the rpm to 7500RPM Pls help me
yoir scooter have 13,0 hp at 8500 rpm and 9,4 hp at 5000 rpm so the best acceleration be at 8500 rpm if belt will not slide what can happen if ypu setup only lighter rollers if not than ok but if yes than better way be change central spring this big one 👌🏻 on stiffer results be the same. but probability of belt slide lower or basically imposiible 👌🏻 but if you setup rpm at 8500 rpm be rolerr spring whatever how and what than your scooter can lost its stock topspeed especiallly assuming manufactpry setup cvt on 5000 rpm and belt go fast to its highest point at font disc and lowerest at rear= highest gear posible cos with such low rpm at which is max torq assuming manufactory setup acceleration before belt achieve higjest gear at max torque rpm so 5000 rpm to let say 60 km/h what for 13 ,0 hp be good setup cos than at 8500 rpm speed be 102 kmbh they could in fact setup it even to 50 km/h 🤐 than 8500 = 85 km/h than if it have anarrow peak power so it egzist very short from 8500 and power drop rapidly than if ypu setup 8500 rpm level be rollers or spring up to 50 km/h than yea 🤭 it probabaly hit in rev limiter at like 60-70 km/h and the end of acceleration and engine scream max what be catastrofcallly bad setup for feg highway cruising 🤭 🤷🏻♂️ in such situation you will need to change primary shaft drive 👌🏻 for catch belt on highspest point at like 80-90 km/h + change rollers spring asf 👌🏻 than be ok if it have wide peak than no trouble 👌🏻it will have better acceleration and not lower top speed 👌🏻 alot depend how you use scooter in what road condition uphill head wind highway whatever so the outcome can satisfy you or not 🤷🏻♂️ perfect cvt work with hydraulic electeic etc engine/arm which force disc to change posiition on perfect one depend on road condition and what driver expect at specified point in time so max acceleration at each speed so driver open throtle to max ? and cvt setup rpm imdiatllelya t peak power rpm 😎🌪️ so strongest rpm ever 👌🏻 for lowering fuel cosnumption asf on lower rpm asf …. but none scooter have such stuff with typical cvt you need change alot stuff often for make cvt work perfect for your needs some have such setup stock cos peak power is wide and they have already in stock form basically max posibble acceleration thrpugh whole range speed and top speed limited be all outside resist 👍🏻 in such egzample if you change something you can screw its performance 👌🏻 but most scooters dont have this setup cos its power graph dont have very wide peak power than manufactory go on compromise in regard to peak power level often sacrifice max acceleration be setup rpm at peak torque rpm where power is lower but thanks this scooter have lower fuel consumption is lesss noise asf 👌🏻☕️
@@mociczyczki according to the information you shared To achieve the most optimal speed, it is necessary 1/ The belt is located at the highest point of the face pulley at maximum torque rpm 2/ The time from maximum torque rpm to maximum HP must not be too fast
@@qbwash4282 what? 🤷🏻♂️ long story short max acceleration at set speed = 8500 rpm /max power of engine everything else is preferention setup asf if you want max acceleration at 30 km/h cvt must ho,d at this 30 km/h 8500 rpm sp peak power rpm if ypu want max acceleration at 80 km/h the same cvt must hold engine at 8500 rpm because watt:m/s= force and force :mass/all resist = acceleration 👌🏻simple ☕️
I understand what you mean. If you want to accelerate quickly, you must reach 8500rpm and maintain it there, but I want to have top speed as I said above, I don't know if it is correct as you shared.
@@qbwash4282 if you want speed in terms of top speed for long cruising well first of all in what condtiin you ride uphill downhill asf if alot uphills lowpressure etc than higher rpm first you must know how is setup stock cvt cos it can have small quantity of gears due to feg small cvt disc radious etc etc than if you recognize stock setup than you can setup for what you want in regard to riding condition in which you typically drive 👌🏻 rpm level acceleration level topspeed level if it have wide peak power band than you can setup 8500 rpm from low speed and it dont lossse top speed but engine be very noisy cos always work on high rpm 👌🏻 if you dont need max acceleration from low speed assuming kanufactory dont setup rpm on peak power rpm from low speed but peak torque and you want only good topspeed for cruising on highway and this scooter have narrow peak power than left stock setup cos they typicallly setup optimal gearing for topspeed in standarised test condition for all resist which scooter have typical topspeed with upright position on level tarmac asf for 13 hp scooter be like 90 km/h gps max 👌🏻unless you drive alot down hilll than you can put lil heavier rollers asf precise setup can be choice only after knowing precise stock setup and what you need otherwise you knownwhatever 👍🏻☕️
All a variator does is keep the rate of rpm stable at the rpm you desire. The lower the weight, the less centrifugal force, the higher the rpm. If you don't understand the principal of a CVT transmission you will never understand this. Search CVT transmission explained on RUclips.
2STROKE STUFFING oh ya, one thing I'm still confused, is it true if we replace the stock clutch spring with the softer spring, will result in the clutch being slip in high RPM??
2STROKE STUFFING if I install new CVT Spring that harder than stock, and roller is standard/stock as well. What will happen with the Top Speed? Whether it'll decrease?
Just to double check, and I know I'm unlikely to get a response on such an old video, but I've just picked up an old Italjet to tinker with... When you say "shift at peak power" do you mean that it shifts INTO peak power, or shifts gear once it reaches peak power?
Engines hp and torque cross around 4000 rpm Then torque fall off hp takes over. You shift at the redine of your build. Bigger gear in front smaller in back is top end IE switching from a 11 to a 13 up front gives you top end. 11 to 10 would be low end. Smaller gear in back 52 to 50 top end. Big gear 58 to 60 in back, low end. You change ine or both til your happy with what your butt dyno is 'telling you' When i raced We'd go up 1 in front down 2 in back In the 70s i had a 125 italjet dirt bike. Finicky bastard. Carb will be your biggest issue. Yee haw
@@jamesbeason9256 oh no I get final drive ratio adjustment and fine tuning. I don't shift at red line because redline is where the limiter kicks in to protect the engine - it's not the peak Hp OR torque, nor does it allow shifting into peak power or torque in the next gear. I was more wondering about the terminology used - "shift at peak power", seems counterproductive - wastes power, and shifts into a gear too early. I've managed to sort out carb, home made exhaust pressure formed) and lubing system - the thing is lowered and has a stretched chopperlike front end on it, and wheelies like hell!
@@jamesbeason9256 btw +1 front and -2 rear is equivalent to a -5 on the rear...none of my smaller cc bikes have enough power in the top gears to hold that sort of gearing - hell, less than -4 rear on the 125s and I lose the use of 5th gear on anything more than downhill :P
@@the_mad_ratter You probably know more than I about a gy6. But, these engines can spin 10k rpm. I don't know where your rev limter is set. I'd ditch it, get an adjustable timing box. BUT, I ja3ve drag raced for 45 years. Most recent 675hp 540lb o torque NA big block chevy. You shift at your red line. Mines 7200 on the chevy. You really need a dyno to see the shift point. Your butt dyno will feel your bike nose over just a little. Your hp just took a hit. Drop 500rpms, theres your red line and your shift point. Thats why, back in the 60s 70s you'd see a bracket car guy miss a shft, instant windowed block. No room for missed shift at 6500rpm. You probly know that the term 'Red line' is arbitary. A lot of motors wil rap til they blow up. I think mopars do that. Its actually a movable needle on your tach. You decide thru track time and dyno. Chassis set up is 'yuge'. We measure 60 ft 120 feet times for our hole shots. When the car hits the traps it's right on the edge of grenading. Racin is racin. I build and test my r/c cars the same way.
@@the_mad_ratter Idk if your engine is stock or a monster. The valve springs go first. I doubt you could blow the engine up, throw a rod. Your more likely to float a valve first There is your first mechanical rev limiter. You may drop a valve. So, if you have a stock engine, remove your rev limter your mechanical rev line is 500-1000 rpms before the valves float. You may have ran out or hp before that happens. RPMs come from large by huge cams and boolit proof bottom ends. These engines a needle bearinged engines. Valvetrain is the weakest point. I hope I've been some help,madratter
Great tip! But how to know the peak power in my Vespa GTS 150 rpm range? I’m buying a Malossi Multivariator specific for my scooter that comes with 12.5 gr rollers should that be right?
I have a fes125 and when I am at full throttle the bike feel like it is pulling back, so I have to release and hold the throttle just under full throttle to stop this, can I do anything so I can just keep it full6 with out juggling with the throttle
Heavier rollers or lighter can't make topspeed increased, but weighy of the rollers is show when they are can shift the gear.... Lighter rollers make ur variator opens slowly late, it means make ur gear at lower positions longer, n make ur bike felt little aggresive.... Heavier roller make ur variator opens very soon n make ur gear at high positions even ur bike stands at low rpm, maybe it can make ur bike felt boggie little bit.... Are this is true?
Hi their bud. First off love your videos man but I’m stuck I’ve ask many people on Facebook but most of them are jerks. I just installed a naraku CVT kit on my 50cc. But no power can u give me a starting point for me To start at for springs and rollers please
Hi if i change my contra spring to a stiffer one like 1500rpm..should i replace the rollers with less weight or use heavier rollers?i was using 1000rpm contra spring before and using 10g rollers
@@pistolerongpinoy4893 try 8grams roller and 1000rpm center spring.and don't change the stock clutch spring . It will make it fast to accelerate and achieve early to ur top speed and less vibration ..
I am a novice when it comes to motorcycle tuning but, regarding this topic. What will happen if I change the idle rpm to high or low. Will it affect the performance of the roller weights?
@@2STROKESTUFFING Almost bought a scooter where someone did this. Once the engine turned on, you'd have to hold the brake at stoplights else you'd cruise through at 5mph. The seller said he did it for increased acceleration. To me though, it felt like it was wearing out the clutch.
Sir I have a 125cc automatic trans/scooter, with 13.5 degree/overange pulley, 1000rpm center and 1000rpm clutch spring, my weight is 68kgs, what would be the match roller weights for this kind of cvt set up?
Hello..I have a 125cc gy6 scooter and I installed a (2000rpm) spring clutch and the 3 little springs. Also 13g (18x14) sliders. But my scooter doesn't speed over 80km/h. Should I install 1000rpm spring clutch, and lighter rollers, for better performance..?
@@Raulperez-yc9de remove the clutch springs and out the stock ones. Install a 1,000rpm center spring instead. He's right, put straight 10 roller weights. Mine's a 125cc Yamaha. 11grams roller weights, 4s1m racing pulley and drive face, stock clutch spring (800rpm?), and 1000rpm center spring. It revvs somewhere in the mid to high range and gets a top speed of around 100kp/h (around 62mph) easy.
There's six roller weights all together could you take out three of them to go for a lighter setup would it possibly still work or would you need all 6 of them. So pretty much can you use just 3 roller weights.
Hello sir...I have a 125cc gy6 scooter and I installed a (2000rpm) spring clutch and the 3 little springs. Also 13g (18x14) sliders. But my scooter doesn't speed over 80km/h. Should I install 1000rpm spring clutch, and lighter rollers, for better performance..?
I played with my variator weights , now I'm getting a lot of pulsing vibration even with the ones I started with. All of them are roller weights no sliders. Any idea where this could be coming from!?
what grams may I use if im am 90kg and my backride is 80kg...may stopspeed is 80kmph and when uphill almost 40/50kmph.im using 12gx6 of roller.it's very slow.tips how it work for best
"Try not to Become a man of success, but a man of value"
That's the truth
Thank you for that random motivation
That one sentence has made me subscribe... I accept this challenge...
I would like to live in a planet with more gentlemen with this kind of posture and less haters .
So basically, the rollers perform the same function in a cvt that sprockets perform on a chain-driven bike. Lowering or raising the tooth count of the sprockets on the bike won't give you "more" top speed or acceleration, it will simply work differently with the engine/rpm band and you'll trade one for the other, depending on gearing. Different weight rollers will keep you in a certain 'gear' longer or shorter as your engine revs. Which is 'better' is dependent on how you ride the bike and where your engine likes to operate.
Incredibly well stated.
That is exactly what the variator does.
If it's viewed as this analogy it should be thought of as a person with the ability to exert X amount of force to the bicycle crank at a range of rpm. The same work being done viewed as calories expended and muscle worked\torn. Hypothetically a person can pedal faster with less force to get to and maintain 20mph or pedal slower with more force to achieve the same result. Operating in a reasonable range of the ability of the person\powerplant\ engine, it will end up at the same top speed eventually as long as the parameters are within a good range of specification.
Man of Value. Well said.
15,000rpm if your turning those kind of numbers your not gonna watch this for advise you are spot on as to light weights shift at high rpm and heavy shift quicker what makes the decision is how much weight are you hauling off the line
A light rider, say 110 lbs.. heavy or light weights? I actually wanna make my 150cc scooter Slower Less Powerful to learn on. Perhaps I should have started with a 50cc but I didn't have that option.
good explaination.. people forget that the variator spin on the crankle.. modifing weights and change with a more performance variator is equal to lightening a flywheel. higher rpm without a correct calculation isn't a good choice, risk of overspeed is dangerous. remember.. at high rpm the torque.. decrease.
I installed some sliders 11g with a racing variator , i found i accelerated much quicker and got to 46mph pretty fast, however i do now find that i struggle to get to 57mph which is what i got on stock, but i think it is because i have a lighter weighted variator and the rollers are now sliders producing better acceleration at the cost of top end speed.
Very informative, well explained and love the quote at the end. Excellent
Thanks!
A MAN OF VALUE!!! very well said!!! thank you for your videos,keep'm coming.
Thanks!
I have a jog90 variator on my Keeway scooter with a 70 cc malossi set up. The clutch is original. Malossi wild Lion exhaust. I had tried 4 gram and 5 grams weights. also a mix of 3.5 gram with 4 gram. still the scooter had a slow take off. When I switched to full 3,5 gram weights everything changed. fast take off. Good speed. 80km/h. I think i can higher topspeed. So, lighter weights with a heavy variator can mae a difference
when the rpm drops as you take off as you wack the throttle the contra spring is too soft
the roller weights that are put in as stock are a compromise , you don't necessarily want a scoot that instantly shoots up to 8k rpm ( peak power) as soon as you fart on the throttle when trying to cruise along At 50 mph an a straight road or through town on a slightly open throttle lol.Its fine if you want that sort of performance ( I know some will)but most that think they do probably don't when they are trying to commute into work in the rain !. Not meaning to be a killjoy just saying think about what you want to achieve before you go fiddling and end up with undoubtedly a faster scoot but maybe one thats crap for day to day use. I can never understand why people think putting heavier weights in the variator gives better top speed it can only ever close up so far and unless you put stupidity low weights in it or you fit a spring that is way too strong it will always close up as far as it will go giving the same top speed.
this is my problem now, normal casual takeoff takes 6000rpm to get the bike going its a pain in stop and go traffic lol i will try a heavier rollers
actually there is another factor (RPM) regardless of pulley belt travel, as the belt reach the top of the pulley the bike will now accelerate as the engine RPM increases lets say if you put heavy roller and your belt tops out at 7000rpm and it cannot go anymore faster but when you put lighter rollers your belt tops at 8000rpm and the engine produces a bit more power at such rpm the top speed will slowly creep up together with the rpm a 500 rpm increase at top belt travel could mean 10-20km/h more speed
What about 8 gram roller weights would that be too heavy?
i have pcx 160cc engine. peak at 15.8HP at 8500rpm. it has bigger engine but also heavier bike. at 131kg. with fuel 8.1liter. and oil etc. it will be closer to 140kg. make power to weight ratio even worst.
it has 19gr roller. i think it pretty much self explanatory. very smooth acceleration but also quite a heavy drag.
ill try 17gr roller soon.
I see this all too often in a few Facebook groups I use. I get sick of explaining it haha.
Ok so what weights will i use to gain speed from acceleration and top speed?? Please let me know
Can i keep the stock clutch if i upgrade my variator also do i need to get a different drive belt or can i still use the stock one
Finally thank you so simple yet people make it so damn sophisticated
thank you so much i was gonna buy lighter weights (im actually a biker never ridden a scooter) but i just wanted to check if you had any videos and you did and i figured out i need heavier weights
Went through all the comments and I am still confused.
I don't care about top speed (it is limited to 25km/h anyway).
My used scooter revs very high before the stock clutch grips and start moving. I want the clutch to grip at lower rpm for low speed cruising/traffic. Do I need to go for heavier or lighter weight rollers?
Hi @2stroke stuffing, I hope you read this. Would you recommend keeping the variator at peak horse power rpm, at peak torque rpm, or perhaps somewhere in the middle? Love the video by the way. No blabla, but short and to the point. Cheers!
It depend on power graph and what you want 👌🏻
This is very confusing to the every day rider and the way it was explained is also very confusing. Most scooters come with heavier weights in order to maximize fuel economy and engine longevity. So by default they come with the wrong slider/roller weight. So if you change them to lighter weights you will put the engine in it's power band sooner and you will definitely get quicker acceleration. This video does nothing but confuse people and it should have been much longer with better explanation.
Moped povlači dobro iz mesta. Međutim, ubrzavanje dugo traje. Takođe, da bih ubrzavao, stalno moram da dajem pun gas. Šta treba da uradim da bih mogao dostignutu brzinu da održavam na nižim obrtajima?
great video, very clear and easy to understand.
A good day sir, can you help or what will you recomend weight of the ball for may honda adv150? I use 1200rpm center spring and 1000rpm for clutch spring, my weight is 58kilos!!! Thanks in advanve for your help
well said. most of them apply grease to variator weights. is it recommended to apply grease or oil to variator weights ?
I had lighter weights in mine and prefer the heavier 5 gram weights with my sons set up. 3gram weights just made it rev and snap like crazy.
Will lighter rollers make the torque peak sooner?
My bike is really slow to pick up revs up to around 15-20mph, and then it pulls ok revs fine, is this weights/drivetrain servicing related? Thanks in advance
It's the variator washer. It's still restricted
fishsticks-RND thanks for the reply bud, but I’ve just had variator off, swear I couldn’t see a washer
Also important is clutch spring tension if available. Not for speed but for when/how it engages.
Heavy rollers and light clutch. Is that good combo?
@@nanzansarcadeYou gotta try out whats best for you. But that combo isnt bad
@@nanzansarcade You will get low low end torque as the wheel will start moving early at very low rpm but good for efficiency in traffic as you can then set your idle rpm to very low if your engine doesn't stall when running decently hot.
@@iamakkkshay so if the scooter comes to stall than if I accelerate a bit more it won't stall anymore right?
I got a rebuild kit w little bit heavier weights & I put them in. The engine was constantly winding out, too high rpm before catching, not using ANY of the lower rpms, very annoying. I put the stock lighter weights in & it was much better use of low & high rpms. So the heavy weights made it rev all the time. Yerf dog 150cc
i don't want a fast scooter. i just want a high accelerated scooter. without compromising my fuel. what grams should i use ? - any suggestion ?
I want to know that too, for my wheelies
OK I was running 6.5g in my scooter 49cc with a big bore 100cc kit could not get it over 40. I put 8.5 in it that came with my kit and now I am hitting 46miles why is that ?
The 6.5g weights were probably not enough to push the belt all the way out to the edge.
So basically lighter weight make ur bike launch faster and heavy weight give top speed. He said that isnt how it works but he explained it that way? So im confused.
I appreciate your concluding statement.
But should you aim for peak torque rpm or peak hp rpm is the question, for example vespa 250 gts has peak torq at 6500 and peak power at 8250
Peak power rpm. You'll need a clutch that grabs up there though, otherwise the variator will get stuck at lower rpm.
hi, my 100cc Bali can't go into high rpm when I am standing on an uphill slope. It drivers too slow for at least 20m. I used lighter weights but, the problem persists. As soon as I get higher rpm, the the engine and variator run ok. Don't now how to solve this.
Whan you upgrade to a big bore kit does this change the power band drastically or or will it be relatively close to the same as the powerband when the bike was stock? I have been tuning my scooter with an 80cc bbk on it and it's been tough to decide on what sliders to use in my Dr pulley variator. With 6gm sliders I can reach 8000 rpms downhill and with 6.5gm I hit Max of 7400 rpm. What rpm would you say is to high and most likely skipping over the power band for a 139 qmb 50cc 4stroke? Any input would be greatly appreciated
Thanks in advance.
Excellently explained. How can I check where is the peak power delivered on my scooter without any testing equipment?
In hot rodding we use the 'butt dyno'
'How's it feeeeel?'
I put in 20 gram rollers , no other changes at this time . I do want totry Dr. Pully sliders at 20 grams . Maybe I will need a bit bigger spring on the rear variator . One step at a time . For racing ? No ,for normal use and pulling a cargo trailer .
"become a man of value": much commented already. Thank you for showing the way
I bought weights from my Vespa dealer. I put them in and my bike is slow going up hill.
I can't remember what colour they are. Yellow or green.
I think I took out yellow ones and put in new green ones.
I want to replace them, but don't want to get the wrong ones again. I have a 2014 primavera 125.
I thought the new weights felt a little heavier, than the old ones, but I'm not sure which
Colour the new ones were, only that they are green or yellow?
Can I try 3 different weights together eg 2x16g 2x18g 2x20g?
So what need to do you can jump lights like rabbit? Bowl?
That's valuable man 🙃
Hi. I have yamaha neos 50cc. Max speed is 68km/h . At 55-60km/h it pulls very hard and i want to ask what to change and upgrade for better top speed?
Hello I'm from Greece I have a sym symphony sr 150... I put the tech pulley flying rollers 2..10gr as the original weight but I haven't see any difference... Why is that? All the people I ask before buy the thech pulley rollers they said to me that the performance will improve...
In gearless scooters, should we apply little bit of grease on round shaped rollers and roller-grooves in variator for smooth spinning of rollers in variator?
Or will it make more issues after some time like dust deposit, sides of rollers get flat faster, vibrations will increase etc ?
Please tell what should we do with proper reason.
No, it was prohibited. Grease only need to be added on the driven face iner part and the 3 pins
Maybe, grease is OK to use in racing or other scenarios where the variator will be cleaned frequently and the dust isn't allowed to accumulate. The belt produces a fine dust as it wears. Grease will attract and cause a build up of belt dust in the variator ramps over time.
Hey there senpai. I got 50cc scooter. Ive put 3x10g roller & 3x9 roller on a big torque drive. Suddenly ive got 53kmh tops speed. Ive used 1500 rpm spring. How can i choose right wieght for that kind of setup.. Thnks in advance senpai
Please elaborate on what you mean at 1:10 when you say 'keep the rpm at peak power while the bike is variating". In your example, you use 15,000 rpm so does that mean the bike shifts when that rpm is reached? How can you identify when the bike shifts with a CVT transmission? Thanks
im probably a little bit too late and you know this stuff already. But what i have learned the variator starts to change the gear ratio for example at 15,000rpm (which isnt quite realistic) or where ever your bike makes the most power and it keeps the RPM constant through the range until it hits the maxium "gear ratio" where the belt is in its outer edge at primary variator and at inner edge in the secondary variator.
Cvt doesnt shift like a regular transmission so it doesnt have those noticeable rpm drops when it "shifts" but it changes gear ratio when the rpm in trying to get over the limit set by the rollers and contra spring. You cant really tell when the variator "shifts" because it has an infinite amount of possible gear ratios and its so smooth because of that. Its possible that i got something wrong.
Change roller or contra spring first for fully standard scooter?
Hey there,
I am new to most of this. How do you approach figuring out what your machines peak RPM is, and then further matching the weights to achieve that?
it is going to be based on 2or4 stroke and the displacement and square of your cylinder. There are calculators available to give that number.
A channel named FIFTYmil is spreading this false information, just because he achieved better results at lighter weights he concluded it is better for scooters to have lighter weight.
He's not alone...
i love the somewhat daily stuffing videos. So if you put heavy weights on then you will have the same top speed, when you use the lighter ones?
Thanks! Yep, as long as the variator can gear out fully - too light and it won't.
i also like the end quotes :D
@@2STROKESTUFFINGactually it still can top out as it just takes more RPM to create that centrifugal force ,my crazy friends tried removing 2 roller weights in a 6 roller setup, only 4 was installed and the lazy scoot transformed into an rpm monster with loads of acceleration i marked the pulley and the belt still tops out the rpm went up from lazy 8000 to 10000, 4 stroke scoot
I been struggling to get my scooter back to 49mph top speed. My bike only does 45mph now but it does have better acceleration. Man of value.
I don't remember if my scooter had light or heavy rollers put in. But 2 months ago I had my 49cc scooter upgraded to a 110cc, but before I was able to reach 50+mph going downhill but only 35 on flat ground. Now with this engine I can only go 45mph on flat ground and downhill, and just over 30 uphill. Do I have light or heavy rollers?
You have heavier rollers that do not accommodate your engine upgrade. Experiment with lighter rollers to boost your engine RPM and keep the engine within desired power-band. Thanks.
Your mechanic lied to you.
My experience regarding upgrading scooters the bigger the engine upgrade the lighter the rollers and stiffer the contra spring, it just produces so much power and so fast that the roller weight shift up the variator too soon actually making the bike slower than stock
How do I determine the peak rpm? And which weight does keeps it say at 15k rpm
1) check google for your bike specification
2) your scooter dont rev to 15k rpm
my 2019 burgman 400 has the same top speed with 14gr rollers and 20gr rollers...140km at same rpm 8500 i can not understand why it happening...what can i do to improve it...Thank you very much in advice
Top speed isn't affected by roller weight as long as the variator is able to "gear out" fully.
With 2 kind of roller I think is how quick u can get get that top speed not how much more the top speed you can get.
How would I go about finding the RPMs of my scooter? I'm new to this all and feel lost at times. What are some recommendations for increasing overall top speed? I can get my scooter up to 35 mph; however, I would like to reach 50/55 mph. Any website or channel recommendations for beginners?
Buy a small engine tach.
You can change top end by installing a 2 tooth bigger gear on the engine AND OR 2 teeth LESS on rear gear.
Try
Rolling Wrench garage on youtube
@@jamesbeason9256 Why do you call Rolling Wrench Garbage? I assume you are speaking of his gear ration upgrade kit. That coupled with the Reveno clutch he claims his bikes do 100 mph.
@@DivergentDroid he said “garage”.
@@denmar355 So he Did. I must have been Really stoned that night. Can you spare a dollar, I haven't eaten in 3 days since I stole this guys cell phone and dead hooker. ( I used the one that worked)
Hello, i have an original weights 8g and i want to lower the starting rpm from 4500rpm to 3000rpm. Should i increase or decrease the weights? Tq
change clutch slprings those small one on weaker than starting rpm be lower cos clutch faster catch 👌🏻
Hi bro i have 155cc scooter with max torque of 13.8 N.m @ 6,250 rpm and max power of 11.1kW / 8,000 rpm. What is the best roller weight to have better top speed??
+Des Musix Hey there! Impossible to say due to variables like roller ramp angle, spring stiffness etc, sorry. Trial and error is the way to go.
@2STROKE STUFFING Do you have experience with using "Dr. Pulley" sliders instead of of rollers?
What weights should i put on MALOSSI RED SPRING +40% ? between 4.0g and 5.5g?
yes, buy set of 4.5 and 5. start of with 4.5 and later mix
Yup! The flyweights should be chosen to keep the engine at power.
Problem is i dont have rpm gauge so i dont know if my weights are good or not, or where my engine power îs the highest, for exemple at a carburetor engine, does it have like a cutfuel at certain rpm or it just keeps reving untill it destroy itself?
This is so true man. Thanks for sharing.
So Heavier Rollers decrease fuel consumption
Hello thanks for the information its very helpful and informative, if you have time I have a few questions about the torque driver and I would like to know if you can help?
Excellent video. Very well explained.
Yah but don't you also want a lighter roller if you live in a hilly area
Hi , what would you suggest for me , I have Kymco Downtown 125i, stock weights are 12gr . I got Polini Variator with 9gr and 11.8gr. and I did the combination of 3x9gr and 3x11.8. I notice improvements in acceleration but not end speed , this actually decreased. This scooter gets peak power 11KW at 7350rpm . I ordered 10.4 gr and 13.2 gr polini weights to try out that combo and see , but doyou have any suggestions? Thanks
Awesome explanation! Keep it up bro 👍
my bike "is stuck" sometimes on 50km/H it will have to go over 55km/h and aftger 55 it accelerate like a madman to 70-75km/h .. im throwing my 17,5mm carb on i just have the 12mm original now on my 70cc cylinder... tried heavy rollers and it did 80km/h but way to slow acceleration. i had 7gram when it did 80, and now i have 6.5 i think
How can we identify where the peek power sits on our engine in order to install the right roller weights?
I change my variator and when I move the lower RPM The bike vibrate what are your symptoms
CVT transmissions are obnoxious.. Put a performance clutch, weights, and pulley on all you wan't it's not going change the ratio and loss from clutch, and they also wear out quick.. Flat weights, worn springs, and worn belt are so common there is a hot market do to all the chinese stuff that uses CVT
I changed 5,5g rollers for my chinese 50cc (gy6 engine) and now from standing start the engine revs quite high before the transmission "catches" and then the rpm gets lower and rises gradually as speed increases. This revving didn't happen with the old rollers but the RPM just increased logically from standing start. Now my question is: could this revving start cause damage to the belt/clutch or the cones so should I get slightly heavier rollers?
Maybe try 6g
C.V.T continuous variable transmission what gears are u shifting
I have a Vario scooter ( 150cc )
Maximum capacity
9.7kW at 8500rpm
Maximum torque
13.4Nm at 5000rpm
According to your instructions, if you want the scooter to accelerate quickly, you have to put the roller (lightly) to increase the engine rpm, right?
Then the amount of RPM allowed to increase ranges from 5000-8500RPM
so can i use the roller (light) to increase the rpm to 7500RPM
Pls help me
yoir scooter have 13,0 hp at 8500 rpm and 9,4 hp at 5000 rpm so the best acceleration be at 8500 rpm if belt will not slide what can happen if ypu setup only lighter rollers if not than ok but if yes than better way be change central spring this big one 👌🏻 on stiffer results be the same. but probability of belt slide lower or basically imposiible 👌🏻 but if you setup rpm at 8500 rpm be rolerr spring whatever how and what than your scooter can lost its stock topspeed especiallly assuming manufactpry setup cvt on 5000 rpm and belt go fast to its highest point at font disc and lowerest at rear= highest gear posible cos with such low rpm at which is max torq assuming manufactory setup acceleration before belt achieve higjest gear at max torque rpm so 5000 rpm to let say 60 km/h what for 13 ,0 hp be good setup cos than at 8500 rpm speed be 102 kmbh they could in fact setup it even to 50 km/h 🤐 than 8500 = 85 km/h than if it have anarrow peak power so it egzist very short from 8500 and power drop rapidly than if ypu setup 8500 rpm level be rollers or spring up to 50 km/h than yea 🤭 it probabaly hit in rev limiter at like 60-70 km/h and the end of acceleration and engine scream max what be catastrofcallly bad setup for feg highway cruising 🤭 🤷🏻♂️ in such situation you will need to change primary shaft drive 👌🏻 for catch belt on highspest point at like 80-90 km/h + change rollers spring asf 👌🏻 than be ok if it have wide peak than no trouble 👌🏻it will have better acceleration and not lower top speed 👌🏻 alot depend how you use scooter in what road condition uphill head wind highway whatever so the outcome can satisfy you or not 🤷🏻♂️ perfect cvt work with hydraulic electeic etc engine/arm which force disc to change posiition on perfect one depend on road condition and what driver expect at specified point in time so max acceleration at each speed so driver open throtle to max ? and cvt setup rpm imdiatllelya t peak power rpm 😎🌪️ so strongest rpm ever 👌🏻 for lowering fuel cosnumption asf on lower rpm asf …. but none scooter have such stuff with typical cvt you need change alot stuff often for make cvt work perfect for your needs some have such setup stock cos peak power is wide and they have already in stock form basically max posibble acceleration thrpugh whole range speed and top speed limited be all outside resist 👍🏻 in such egzample if you change something you can screw its performance 👌🏻 but most scooters dont have this setup cos its power graph dont have very wide peak power than manufactory go on compromise in regard to peak power level often sacrifice max acceleration be setup rpm at peak torque rpm where power is lower but thanks this scooter have lower fuel consumption is lesss noise asf 👌🏻☕️
@@mociczyczki according to the information you shared
To achieve the most optimal speed, it is necessary
1/ The belt is located at the highest point of the face pulley at maximum torque rpm
2/ The time from maximum torque rpm to maximum HP must not be too fast
@@qbwash4282 what? 🤷🏻♂️ long story short max acceleration at set speed = 8500 rpm /max power of engine everything else is preferention setup asf if you want max acceleration at 30 km/h cvt must ho,d at this 30 km/h 8500 rpm sp peak power rpm if ypu want max acceleration at 80 km/h the same cvt must hold engine at 8500 rpm because watt:m/s= force and force :mass/all resist = acceleration 👌🏻simple ☕️
I understand what you mean. If you want to accelerate quickly, you must reach 8500rpm and maintain it there, but I want to have top speed as I said above, I don't know if it is correct as you shared.
@@qbwash4282 if you want speed in terms of top speed for long cruising well first of all in what condtiin you ride uphill downhill asf if alot uphills lowpressure etc than higher rpm first you must know how is setup stock cvt cos it can have small quantity of gears due to feg small cvt disc radious etc etc than if you recognize stock setup than you can setup for what you want in regard to riding condition in which you typically drive 👌🏻 rpm level acceleration level topspeed level if it have wide peak power band than you can setup 8500 rpm from low speed and it dont lossse top speed but engine be very noisy cos always work on high rpm 👌🏻 if you dont need max acceleration from low speed assuming kanufactory dont setup rpm on peak power rpm from low speed but peak torque and you want only good topspeed for cruising on highway and this scooter have narrow peak power than left stock setup cos they typicallly setup optimal gearing for topspeed in standarised test condition for all resist which scooter have typical topspeed with upright position on level tarmac asf for 13 hp scooter be like 90 km/h gps max 👌🏻unless you drive alot down hilll than you can put lil heavier rollers asf precise setup can be choice only after knowing precise stock setup and what you need otherwise you knownwhatever 👍🏻☕️
Why does Dr. Pulley suggest 10-15% lighter sliders over stock roller weights??
Probably cause they "slide" better...
2STROKE STUFFING I get it, Since there is less friction you can use less weight to "push " the slider, thank you.
All a variator does is keep the rate of rpm stable at the rpm you desire. The lower the weight, the less centrifugal force, the higher the rpm. If you don't understand the principal of a CVT transmission you will never understand this. Search CVT transmission explained on RUclips.
My friend also told me that if we change CVT spring with harder spring than stock, roller should more weight. Is that true?
If you want to keep it shifting at the same rpm, yes.
2STROKE STUFFING oh ya, one thing I'm still confused, is it true if we replace the stock clutch spring with the softer spring, will result in the clutch being slip in high RPM??
Nope, will just grab earlier.
2STROKE STUFFING if I install new CVT Spring that harder than stock, and roller is standard/stock as well. What will happen with the Top Speed? Whether it'll decrease?
As long as your variator can still gear out fully it won't affect top speed.
This makes more sense
Just to double check, and I know I'm unlikely to get a response on such an old video, but I've just picked up an old Italjet to tinker with... When you say "shift at peak power" do you mean that it shifts INTO peak power, or shifts gear once it reaches peak power?
Engines hp and torque cross around 4000 rpm
Then torque fall off hp takes over.
You shift at the redine of your build.
Bigger gear in front smaller in back is top end
IE switching from a 11 to a 13 up front gives you top end. 11 to 10 would be low end.
Smaller gear in back 52 to 50 top end. Big gear 58 to 60 in back, low end. You change ine or both til your happy with what your butt dyno is 'telling you'
When i raced We'd go up 1 in front down 2 in back
In the 70s i had a 125 italjet dirt bike. Finicky bastard. Carb will be your biggest issue. Yee haw
@@jamesbeason9256 oh no I get final drive ratio adjustment and fine tuning. I don't shift at red line because redline is where the limiter kicks in to protect the engine - it's not the peak Hp OR torque, nor does it allow shifting into peak power or torque in the next gear. I was more wondering about the terminology used - "shift at peak power", seems counterproductive - wastes power, and shifts into a gear too early.
I've managed to sort out carb, home made exhaust pressure formed) and lubing system - the thing is lowered and has a stretched chopperlike front end on it, and wheelies like hell!
@@jamesbeason9256 btw +1 front and -2 rear is equivalent to a -5 on the rear...none of my smaller cc bikes have enough power in the top gears to hold that sort of gearing - hell, less than -4 rear on the 125s and I lose the use of 5th gear on anything more than downhill :P
@@the_mad_ratter You probably know more than I about a gy6.
But, these engines can spin 10k rpm. I don't know where your rev limter is set. I'd ditch it, get an adjustable timing box.
BUT, I ja3ve drag raced for 45 years. Most recent 675hp 540lb o torque NA big block chevy.
You shift at your red line. Mines 7200 on the chevy.
You really need a dyno to see the shift point. Your butt dyno will feel your bike nose over just a little. Your hp just took a hit.
Drop 500rpms, theres your red line and your shift point. Thats why, back in the 60s 70s you'd see a bracket car guy miss a shft, instant windowed block. No room for missed shift at 6500rpm. You probly know that the term 'Red line' is arbitary. A lot of motors wil rap til they blow up. I think mopars do that.
Its actually a movable needle on your tach. You decide thru track time and dyno. Chassis set up is 'yuge'. We measure 60 ft 120 feet times for our hole shots. When the car hits the traps it's right on the edge of grenading.
Racin is racin. I build and test my r/c cars the same way.
@@the_mad_ratter Idk if your engine is stock or a monster. The valve springs go first. I doubt you could blow the engine up, throw a rod. Your more likely to float a valve first There is your first mechanical rev limiter. You may drop a valve.
So, if you have a stock engine, remove your rev limter your mechanical rev line is 500-1000 rpms before the valves float. You may have ran out or hp before that happens.
RPMs come from large by huge cams and boolit proof bottom ends. These engines a needle bearinged engines. Valvetrain is the weakest point.
I hope I've been some help,madratter
choose the weights where to most Torque is or where the most HP is ?
acceleration and topspeed = hp for lower fuell consumptionless noise = lbf ft
👌🏻👌🏻👍🏻✨
I have an elystar 50cc , what rpm does this scooter makes? I bought it cheap used and needs new transmission
Great tip! But how to know the peak power in my Vespa GTS 150 rpm range? I’m buying a Malossi Multivariator specific for my scooter that comes with 12.5 gr rollers should that be right?
Without a dyno you'll have to go by feel/ear and trial and error.
2STROKE STUFFING thanks for the quick reply. So I can’t even trust the 12.5gr that the Malossi Variator comes with specific for my model scooter?
Nope, but 12.5 is probably in the ballpark.
sir may i ask which is better roller the cylindrical like dr pulley or the round shape?ty
dr pulleys geometry is an upgrade... dont believe me... dr pulley video ruclips.net/video/yxcQGmT8EJc/видео.html
I have a fes125 and when I am at full throttle the bike feel like it is pulling back, so I have to release and hold the throttle just under full throttle to stop this, can I do anything so I can just keep it full6 with out juggling with the throttle
hi im from phillipines im always watching this... can you help me i have a gy6 150cc wht is the best roller weight for this...
Sorry, impossible to say - you'll have to try lighter/heavier weights and see how it reacts.
Heavier rollers or lighter can't make topspeed increased, but weighy of the rollers is show when they are can shift the gear....
Lighter rollers make ur variator opens slowly late, it means make ur gear at lower positions longer, n make ur bike felt little aggresive....
Heavier roller make ur variator opens very soon n make ur gear at high positions even ur bike stands at low rpm, maybe it can make ur bike felt boggie little bit....
Are this is true?
Weigth for max aceleration ?? 13 gr... Or 10gr and max speed 8gr... Please help me
Hi their bud. First off love your videos man but I’m stuck I’ve ask many people on Facebook but most of them are jerks. I just installed a naraku CVT kit on my 50cc. But no power can u give me a starting point for me To start at for springs and rollers please
Hi if i change my contra spring to a stiffer one like 1500rpm..should i replace the rollers with less weight or use heavier rollers?i was using 1000rpm contra spring before and using 10g rollers
Don't change the rollers and see how it behaves, if not to your liking go lighter/heavier.
2STROKE STUFFING thanks will try 10g rollers again..
Currently using the 9g rollers. Take off is good..but too long to hit 100kph
@@pistolerongpinoy4893 try 8grams roller and 1000rpm center spring.and don't change the stock clutch spring . It will make it fast to accelerate and achieve early to ur top speed and less vibration ..
I have a 300 cc Honda forza nss300 what weight should I used?
I am a novice when it comes to motorcycle tuning but, regarding this topic. What will happen if I change the idle rpm to high or low. Will it affect the performance of the roller weights?
Won't affect it, if you set idle high enough your scooter will drive off by itself tho...
@@2STROKESTUFFING Almost bought a scooter where someone did this. Once the engine turned on, you'd have to hold the brake at stoplights else you'd cruise through at 5mph. The seller said he did it for increased acceleration. To me though, it felt like it was wearing out the clutch.
@@FutonStories good way to hide a blown out clutch, if a scooter cant roll when off its clutch is blown out
What about the mileage? For more mileage with decent acceleration should i use heavy or light weights
Heavy because it will lower the rpm of when the variator begins it’s process of changing gears. The lower the rpm, the better the fuel economy.
@@MrSagerific95 understood
Heavy = mileage
Light = pickup
Sir I have a 125cc automatic trans/scooter, with 13.5 degree/overange pulley, 1000rpm center and 1000rpm clutch spring, my weight is 68kgs, what would be the match roller weights for this kind of cvt set up?
+Lleonard Vhan Impossible to say, you'll have to go by trial and error.
Hello..I have a 125cc gy6 scooter and I installed a (2000rpm) spring clutch and the 3 little springs.
Also 13g (18x14) sliders.
But my scooter doesn't speed over 80km/h.
Should I install 1000rpm spring clutch, and lighter rollers, for better performance..?
@@Raulperez-yc9de remove the clutch springs and out the stock ones. Install a 1,000rpm center spring instead. He's right, put straight 10 roller weights. Mine's a 125cc Yamaha. 11grams roller weights, 4s1m racing pulley and drive face, stock clutch spring (800rpm?), and 1000rpm center spring. It revvs somewhere in the mid to high range and gets a top speed of around 100kp/h (around 62mph) easy.
There's six roller weights all together could you take out three of them to go for a lighter setup would it possibly still work or would you need all 6 of them. So pretty much can you use just 3 roller weights.
Jamie Chap yes
Hello sir...I have a 125cc gy6 scooter and I installed a (2000rpm) spring clutch and the 3 little springs.
Also 13g (18x14) sliders.
But my scooter doesn't speed over 80km/h.
Should I install 1000rpm spring clutch, and lighter rollers, for better performance..?
Clutch doesn't help top speed....
I played with my variator weights , now I'm getting a lot of pulsing vibration even with the ones I started with. All of them are roller weights no sliders. Any idea where this could be coming from!?
+Nick Badillo Are they worn? Sound strange...
Probably put back together wrong. Spacers in the wrong spots.
i tried tuning my scooter
the damn thing variates at 8,000rpm
consumes lots of gas but it sure does accelerate good
I hit 48-50 with 5.5 and 7 gram weights and im always at 8500 rpms and no cdi yet
ease19811 fuck yeah big weenie
but what if there are no weights or 50% are removed
what grams may I use if im am 90kg and my backride is 80kg...may stopspeed is 80kmph and when uphill almost 40/50kmph.im using 12gx6 of roller.it's very slow.tips how it work for best
Impossible to say, sorry. Every setup is different, you'll have to experiment with lighter/heavier rollers and see how it reacts.
thank you...I'll try...good job...:-)
Thanks!
6x6 or 4.5x6 would be for full time dual riders
I have speedfight 3 70cc please tell me which rollers