I had a grom and it was fun for a while but after the novelty factor wore off I was wondering what I could change to have fun again. The answer is dropping a bunch of money into the engine or finding other mini bike buddies to ride with. Neither of these happened and I sold it. But your video confirmed a suspicion I had. The chassis is capable of handling 3 times the stock power without being unstable (apparently) so it's no wonder the stock power plant feels gutless. Great video.
I think Honda really should cram the rebel 300 engine into the Grom from factory. Beef up some components, the frame, just for saftey. Get us up to those higher top speeds so the bike doesn't get boring so fast. Plus I can't even ride a stock grom into town because the hills are too steep and speed limits too high. A 300 Grom from factory would actually make it a great bike. Especially for those guys that turn them into touring bikes. Being able to carry a few more pounds and keep the speeds up would allow it to go on interstate. Plus the little tiny 125 engine wears out quickly and a bigger cc engine would make it last longer. Imagine if it was normal to be able to take a well taken care of Grom to 100k instead of 50k and for very close to the same price. Power to weight ratio would be nuts
@@jco5254 yes and you can buy them with the right paperwork, they are very cheap. MP5s are only a few hundred dollars, because only military and police can buy them freely, citizens can access them through the three SOT credits on behalf of government institutions or if an SOT person fails to renew the credit other SOTs can buy their stock.
The problem is the intake manifold. Your fuel won’t atomize correctly with the injector being around a bend in the intake. Chimera sells a better manifold.
At 6:20 when you say "I need whatever that is" about the van. That is a Mitsubishi summit/expo mini van that you can 4g63 head swap onto the 4g64 block that most come with. Also to note they made AWD version of that van
From one biker to another, if the car in front of you is leaking coolant (or whatwver) you get as far away from it as humanly possible! It's like soap and can fuck everything up in a matter of seconds. Stay safe and keep making 💥 content👍
Did the tune help? I had heard these have a tough time idling because there is a 90 degree bend on the intake manifold to clear the frame. This causes the fuel to pool and it's very difficult to tune out... Or that was just a ploy to get me to buy a modified frame to accommodate a 250/300 motor...
I've seen people trying to sell these modified frames, mine is untouched and probably has the pooling problem. Hasn't been tuned yet, decided to go a completely different route and that video is coming soon! 🍻
Wow // stock 19 Grom SF with throttle pegged wide open, going down hill, with a tailwind, & me ducked like a racer goes 70 MPH at redline // more like 62 MPH steady state Cruising speed for Stock Grom SF more like 50 MPH // or 500mi in 10 hours // peak fuel economy for a stock grom in 4th gear at 35MPH on level ground = 134 MPG Factory 124.9cc air cooled fuel injected GROM SF motor good for 9.7 HP at 7,000 RPM. Chimera Cold Air Intake + K&N cone filter / Zoom 304SS full loop exhaust / & Power Commander V or PCV + custom map increases power to ~11.5 HP making it possible to go 62 MPH while sitting up // & makes it sound radically better than stock, though the exhaust smells really strange as the OEM cat gone with the full exhaust // very reliable setup Factory GROM tires are mediocre, I recommend & will replace my with Michelin Power Pure SC when the time comes. Change the engine oil often if you ride it hard // Keep chain coated with chain lube or gear oil, especially if your ride in the rain after the man salted the roads for winter ice protection etc // the OEM chain ok if you keep it well lubricated // a chore or not // not as bad as actually cleaning the chain, just put it on a rear stand, tranny to neutral, spin the rear will & spray chain lube on the chain, you might put a drop cloth, news paper or something down to protect your garage floor for the overspray // a well lubed & well adjusted chain lasts 5X longer or more than a neglected one //
Nothing is more fun and prideful than riding a originally small displacement motorcycle swapped with a high displacement engine. 😂 It’s just so fun when you make a small bike specs go out of wack for the sake of being small and fast.
These go 65-70 stock. That’s pretty impressive almost hitting triple digits. Idk how I feel about the size of the bike tho. Literally a pocket bike. Can’t carry that with two people and bring it into a bed room lol
incredible, I wish I could have a great armory but in my country (Brazil) the gun laws are ridiculous...I do not have a full auto gun, but I do have a 300ZX TT, among other JDM cars R34 and a S15 and some american V8 swapped too, 1948 Ford F-1 with 1992 F-150 351 cid mechanics with nos, a 1940 Ford De Luxe with a 1968 Galaxie XL 390 cid mechanics, anyway great videos and, you are into a lot of unusual cars for the USA, so if you need something that I can easyly find around here... just let me know! and once again... great 300´s!
It would be like riding a very small, weak, slow Ninja 400. Mine was on sale for $3150, does 0 to 60 in 4.6 seconds and has a top speed of 125 mph. Ride on.
I'm so confused, it's wayyyy faster than the Grom. If you mean slower than the CBR300R, it's simply gearing... the wheels on this are like half the size. 🍻
It doesn’t really like to wheelie since it doesn’t come up on power like you expect. I do want to change the gearing a bit. We’ll get it worked out! 🏍💨
haha flat out 89 changes gear goes through a load of revs stays at 89 for ages my old tzr125r 4dl belgrada did about 130mph 😆✌️ miss the old days with my small bikes pinned 100% wide open living the life and loving the sound of ringing it but not really getting into trouble 😆✌️
Hey how's it going it's been nine months were you able to figure out the air fuel mix with the computer? Get back to me I'm trying to build a 300 from myself
Haven't hit 100 yet. I have the aracer and dg1 wideband. Turn on autotune get a basemap done and it will run alot better than the stock ecu with a PC. There is a Grom 300+ group on FB
@@WatchJRGo we did micro squirt on my friends after being tortured by the stock ecu. His only regret was wasting time and $$$$ dealing with the stock crap especially since micro was cheaper then the bs he tried
I think it's dumping in way too much fuel all the way through the rev range.... smells rich all the time. The stock map with fuel added is just a recipe for failure, needs a good tune from scratch. Do you have a Power Commander on a basic map?
@@WatchJRGo Stock ECU sadly. My bike smells hella rich and goes through fuel like its going out of fashion. It sounds like im gonna have to swap out stock then? Boxing day sales i think lol
This may be a little late I have just discovered your channel today but if you contact Brock's performance around Dayton Ohio they can probably help you with your ECU tune
Thanks for the video. I like the Groms but may go with a Monkey this spring. Dodge Rider did a swap on a grom. He may be able to help with some things. He has lots of videos on his swap. Just saying. Have a great new year.
Is it me or does that now 300cc look the same[ish speed as a standard grom, that engine should have at LEAST DOUBLE the HP just by the added CC but it does NOT LOOK TWICE AS FAST AS A STOCK GROM, Something i am missing or what and with 2 extra gears SCOOBS UK.
95 on a grom, i almost pissed myself laughing there man. Thats gotta feel good and wrong all at the same time.
It’s like when the toddler wants to play with the adults... and surprisingly it can 😂
Do you knoe if this is legal ?
fpv Milas who has to know 👀
@@Rocker84100 🤷♂️
Me too! 😂😂 I just kept saying WTF with my mouth wide open.
I had a grom and it was fun for a while but after the novelty factor wore off I was wondering what I could change to have fun again. The answer is dropping a bunch of money into the engine or finding other mini bike buddies to ride with. Neither of these happened and I sold it. But your video confirmed a suspicion I had. The chassis is capable of handling 3 times the stock power without being unstable (apparently) so it's no wonder the stock power plant feels gutless. Great video.
I think Honda really should cram the rebel 300 engine into the Grom from factory. Beef up some components, the frame, just for saftey. Get us up to those higher top speeds so the bike doesn't get boring so fast. Plus I can't even ride a stock grom into town because the hills are too steep and speed limits too high. A 300 Grom from factory would actually make it a great bike. Especially for those guys that turn them into touring bikes. Being able to carry a few more pounds and keep the speeds up would allow it to go on interstate. Plus the little tiny 125 engine wears out quickly and a bigger cc engine would make it last longer. Imagine if it was normal to be able to take a well taken care of Grom to 100k instead of 50k and for very close to the same price. Power to weight ratio would be nuts
@@TheAnnoyingBoss yeah, they should make a grom 125, 250, and 300
@@trailblazer8380 Yeah I mean they did it for the ruckus scooters back in the day so why not the grom?
@TheAnnoyingBoss In a country full of pickups and SUVs your just asking for trouble putting a bunch of groms on the interstate 😂
Sounds like you weren't working on wheelies or going places you probably shouldn't.
7:00 When you pass a bunch of liter bikes on a grom on the highway......
FlightReact's Shoota if you listen you can hear them Speeding up you can hear them coming
@@jechotaparan7704 For real? I don't believe it
@@jechotaparan7704 Really? Shit who would've guessed?
@@redactedrider7606 why u gotta be like that bruh, the comments a year old, youd think i got the joke by now? damn wtf
“It’s a machine gun” most amazing thing ever haha legend
Yeah I don't know if that should have been shown. Hope the dude gave the OK.
@@KeepingItKeith you can buy machine guns in the US
Not so amazing with him pointing it at people.
Ufphen it wasn’t a real “machine gun” that was a new model not pre ban
@@jco5254 yes and you can buy them with the right paperwork, they are very cheap. MP5s are only a few hundred dollars, because only military and police can buy them freely, citizens can access them through the three SOT credits on behalf of government institutions or if an SOT person fails to renew the credit other SOTs can buy their stock.
I like how he's going almost 100 and people are whizzing by at the speed of light.
Welcome to the Midwest🙂
The problem is the intake manifold. Your fuel won’t atomize correctly with the injector being around a bend in the intake. Chimera sells a better manifold.
At 4:19 he talks about spending $419 on an ECU.
That's not a good deal //
Ok
At 6:20 when you say "I need whatever that is" about the van. That is a Mitsubishi summit/expo mini van that you can 4g63 head swap onto the 4g64 block that most come with. Also to note they made AWD version of that van
that one is actually an Eagle summit. i know its the same thing but in my opinion cooler being the rarer option
I subbed when I saw guy with uzi in 300 lmao
I second that!!!!
Only in America 🇺🇸
9:18. Hahahah
probably masterpiece arm's mac10 clone... It got some bad reputations for being unreliable
From one biker to another, if the car in front of you is leaking coolant (or whatwver) you get as far away from it as humanly possible! It's like soap and can fuck everything up in a matter of seconds. Stay safe and keep making 💥 content👍
When he passed the big bikes at 7:00 you can hear them speed up lmao
Hey you can get the power commander auto tune that will plug right into your power commander module. Just weld in an exhaust sensor then plug it in.
Didn't know we had a Dirty Mary Crazy Larry Charger in the area. Sweet!
Looked slick pulling up, great color 💯
It's my sons car.
This is the real first drive since the swap it is amazing how quick it is
I never saw video of it on the street, that's why I decided it was time for a motovlog. Fun little bike! 🏍
WatchJRGo absolutely looks so fun what a great small project hope to see more!
That went 0-100 real quick, and I'm definitely not talking about the grom
life was so much fun before coronavirus missing those days so much
60 degrees is the high and that's cold??? Damn here in Colorado I'd be riding alllllll day in that weather
Same here in Omaha.
me: appreciating the fact that this video exists
also me: gets nervous everytime you go over 70 and I see the front end shaking a little
Yea man it makes me nervous too lol
🇲🇽 Great day for a vacation in Mexico! 🇲🇽
Aye what part of Mexico??
@Life of Po The part where high speeds and street racing happens. 🇲🇽
@Mike Drevo I'd love to get into some of the small engines. So many projects at the moment!
WatchJRGo is this the one from. Itsjusta6 it is right
WatchJRGo
Pa
So you purchased Dom! I can’t wait to swap my grom.. I just bought mine and I’m vlogging my build series every week. Check it out!
crazy to see my hometown on youtube lol. Been years since i went back.
Fun bikes, Tyler and his collection, random exotics, and suppressed machine guns...YES PLEASE!
Time for a turbo!(-; Oh wow, I like Tyler’s new car!
I wonder how that would work out, would need one tiny turbo! 🚀
WatchJRGo Gavin was talking about a turbo at one point.
It's your fault... I'm doing a full standalone, we can easily turbo it now. 😬
WatchJRGo I will gladly take the blame for that!😉
Turbos don't really agree with single cylinders =[
I have my Koso 1704v running just under 100 mph now. Having a highway worthy Grom is pretty damn fun!
I bet car/truck drivers get a shock seeing you keeping up with them/passing them 😂😂😂
Man I heard Kellogg and was like no way he’s in Wichita that’s awesome
Are you running the stock pump in the fuel tank? Just a thought. Could be your rolling stop problem.
I watched another video, apparently the stock pump is good for 30hp
I didn't know i needed this until now
As fun as this seems, I'm just going to buy a mt09 instead and keep my grom for my in town commuter.
Did the tune help? I had heard these have a tough time idling because there is a 90 degree bend on the intake manifold to clear the frame. This causes the fuel to pool and it's very difficult to tune out... Or that was just a ploy to get me to buy a modified frame to accommodate a 250/300 motor...
I've seen people trying to sell these modified frames, mine is untouched and probably has the pooling problem. Hasn't been tuned yet, decided to go a completely different route and that video is coming soon! 🍻
40° in winter? Dude, I live in Michigan. It hits 40° here and that’s shorts and T-shirt weather. Great bike by the way.
The running prob may be because of the throttle body relocation witch puts the injector to far from the intake port.
Wow // stock 19 Grom SF with throttle pegged wide open, going down hill, with a tailwind, & me ducked like a racer goes 70 MPH at redline // more like 62 MPH steady state
Cruising speed for Stock Grom SF more like 50 MPH // or 500mi in 10 hours // peak fuel economy for a stock grom in 4th gear at 35MPH on level ground = 134 MPG
Factory 124.9cc air cooled fuel injected GROM SF motor good for 9.7 HP at 7,000 RPM. Chimera Cold Air Intake + K&N cone filter / Zoom 304SS full loop exhaust / & Power Commander V or PCV + custom map increases power to ~11.5 HP making it possible to go 62 MPH while sitting up // & makes it sound radically better than stock, though the exhaust smells really strange as the OEM cat gone with the full exhaust // very reliable setup
Factory GROM tires are mediocre, I recommend & will replace my with Michelin Power Pure SC when the time comes. Change the engine oil often if you ride it hard //
Keep chain coated with chain lube or gear oil, especially if your ride in the rain after the man salted the roads for winter ice protection etc // the OEM chain ok if you keep it well lubricated // a chore or not // not as bad as actually cleaning the chain, just put it on a rear stand, tranny to neutral, spin the rear will & spray chain lube on the chain, you might put a drop cloth, news paper or something down to protect your garage floor for the overspray // a well lubed & well adjusted chain lasts 5X longer or more than a neglected one //
Nothing is more fun and prideful than riding a originally small displacement motorcycle swapped with a high displacement engine. 😂 It’s just so fun when you make a small bike specs go out of wack for the sake of being small and fast.
I miss meets like this. Been a long time since I've seen people gather like this.
These go 65-70 stock. That’s pretty impressive almost hitting triple digits. Idk how I feel about the size of the bike tho. Literally a pocket bike. Can’t carry that with two people and bring it into a bed room lol
They don't go 65-70 stock. Unless you go downhill breeze to your back
55-60 64 with tuck and wind on my 2014 very steep hill made it hit 67
I just loved the 300´s both the honda swap and the Z32!
I didn't even think about the other 300 😂 Phong's car is extremely nice, and he has an armory that rivals most gun stores!
incredible, I wish I could have a great armory but in my country (Brazil) the gun laws are ridiculous...I do not have a full auto gun, but I do have a 300ZX TT, among other JDM cars R34 and a S15 and some american V8 swapped too, 1948 Ford F-1 with 1992 F-150 351 cid mechanics with nos, a 1940 Ford De Luxe with a 1968 Galaxie XL 390 cid mechanics, anyway great videos and, you are into a lot of unusual cars for the USA, so if you need something that I can easyly find around here... just let me know! and once again... great 300´s!
It needs fuel inrichment on the low end and mabey a notch of timing removed on low end ... Tuner should be able to fix it when you take it in
"the weather changes behind this car" haha
PCV for CBR250R and 300 only comes from Jett Tuning, I’ve used it.
It would be like riding a very small, weak, slow Ninja 400. Mine was on sale for $3150, does 0 to 60 in 4.6 seconds and has a top speed of 125 mph. Ride on.
Don’t lie. You know those numbers were in KPH 🙄
True, true... I like how you guys casually walked around me in the Huracan when the Grom was full throttle 😂
And how we weren’t even on it 😂
Nice shot of my car. Bikes are cool too. I know what you mean though. Seems you can't go anywhere or hang out without some cop showing up
not in Sacramento every Thursday night is bike night at Jamba Juice, dudes on harleys be doing burnouts and donuts
I know this is a older video but I've been thinking about getting a Grom any problems with speed wobbles?
I’ve bought 2 groms in the last 3 months. I’ve only experienced it a handful of times. I also haven’t put the most hours in to riding.
dude come by my work and ill try and find you a power commander! i need help on a motor swap
How can you put a 300cc engine in a smaller lighter bike and it goes slower ? Something not quiet right there
I'm so confused, it's wayyyy faster than the Grom. If you mean slower than the CBR300R, it's simply gearing... the wheels on this are like half the size. 🍻
Bro have you not seen the tire size on these lol physics man
Michael Owen go to the channel itsjusta6 he’s the guy who built the bike so you might get some insight as to how he did it
Get a aracer for the 300 swap and have a full stand alone.. they also have an auto tune
Its weird seeing a grom going 60 with its engine not screaming
When I put a pipe on my 300, I had to run rich by bypassing the O2 sensor between 2-6k rpm.
That ride will make you smile.
i d put an aprilia rs125 2 stroke 34bhp from the 90s...... they were so powerful they had 180 tires stock, 0-60 in 6 sec an top speed of 112mph
come on man i wanna see wheelies and such. also going larger on front sprocket and smaller on the rear will give u more top speed
It doesn’t really like to wheelie since it doesn’t come up on power like you expect. I do want to change the gearing a bit. We’ll get it worked out! 🏍💨
Sounds like it needs a sprocket change to get some better top end
it won't accelerate as quickly though, I don't think top speed is that important but you can definitely appreciate some pulling power at stop lights
@@user-hs2hd7wp9g I didn't mean jump 10 teeth. Just go like 2 teeth... itll help alot on highway and wont compromise accel
@@jaycevessier7554
Maybe 1 up 1 down
@@user-hs2hd7wp9g de
@@c0uchsl0uch de
haha flat out 89 changes gear goes through a load of revs stays at 89 for ages
my old tzr125r 4dl belgrada did about 130mph 😆✌️ miss the old days with my small bikes pinned 100% wide open living the life and loving the sound of ringing it but not really getting into trouble 😆✌️
It's hilarious how no one things you're fast on a tiny bike 🤙
@@TeqHDcasper you got given the name of the bike do some research before putting dumb comments 😉👌
Definitely got a sub same city gotta support the locals XD.. Can't wait to get my first grom and mod the hell out of it !
Hey how's it going it's been nine months were you able to figure out the air fuel mix with the computer? Get back to me I'm trying to build a 300 from myself
Lol the lambo passes at 7:52
Twin Turbo UGR Huracan doesn't mess around! 🏎💨
try a rapid bike evo its alot more set it and forget it with the included auto tune
ditch that stock ecu, wont ever work right with the throttle located like that. have an aracer rc5 on my 300 grom, works great.
Standalone might be the move... plus someone has probably shared a solid map for the aracer. I’ll look into it! 🍻
Yours break 100mph?
Haven't hit 100 yet. I have the aracer and dg1 wideband. Turn on autotune get a basemap done and it will run alot better than the stock ecu with a PC. There is a Grom 300+ group on FB
@@WatchJRGo we did micro squirt on my friends after being tortured by the stock ecu. His only regret was wasting time and $$$$ dealing with the stock crap especially since micro was cheaper then the bs he tried
Also. What causes a refusal to run at idle. My GSR600 Does it and it dtives me insane
I think it's dumping in way too much fuel all the way through the rev range.... smells rich all the time. The stock map with fuel added is just a recipe for failure, needs a good tune from scratch. Do you have a Power Commander on a basic map?
@@WatchJRGo Stock ECU sadly. My bike smells hella rich and goes through fuel like its going out of fashion. It sounds like im gonna have to swap out stock then? Boxing day sales i think lol
Needs a tune or at least a flash
Can't wait to see the Honda cbr1000 swapped grom stand up inovations is doing
Me casually trying to do R&D on 300 swapped groms, not realizing until halfway through the video we live in the same city
That had to give you a grin.... Looks fun as hell
I had to delete all the laughing from the video, it's a blast! 🏍💨
@@WatchJRGo
Giggling like a 12 year old... That's how I am when I drive my K10
Groms are fun as it is Lol needs a 250 two stroke that would be fun too .
when gavin did the swap i didn’t watch his channel everyday did you buy the bike or did he give it to you
What were the vibrations like?
This may be a little late I have just discovered your channel today but if you contact Brock's performance around Dayton Ohio they can probably help you with your ECU tune
This vid was a journey, wild af. Subbed.🤣
My 2024 grom is running 74 top speed on high way #ilovegrom♥️🔥
I knew I recognized that highway 😂 love seeing a local on here
Nice white NA you got there. Did you do an engine swap on that one aswell?
Looking forward to a 600cc grom
Haha, not really going to do that, just what it would take to really keep up with the big bikes! 😮
Some one already did a Hayabusa swap...
Love your choice of friends great cars and guns haha
I have turned one of these and I did an fc yesterday on a cbr250r but the 300 had a stand alone
Thanks for the video. I like the Groms but may go with a Monkey this spring. Dodge Rider did a swap on a grom. He may be able to help with some things. He has lots of videos on his swap. Just saying. Have a great new year.
dragonrider385 monkey is just so damn ugly and plain looking to me
@@jco5254 to some it is. That's why they make so many different kinds of motorcycles.
What state is this? Had my 300 for 5 years now thinking about buying a junky Grom to do this.
Im running a aracer mini rc 5 standalone ecu i like it. Fuel, igition,auto tune capable. Mine has a 2012 cbr250 swap on it
You ever figured out a map for the pcv
have you try Aracer Ecu for fuel tuning ? I believe they do have ECU for cbr 250 and 300
this is so cool. i wish these were legal where i live.
Isn’t this itsjusta6 old grom
It sure is, tons of cool stuff coming for it soon 😎
I think so it look like it
NO it is
Why do you ride in the grease and oil slick lines?
Will a dynojet autotuner fit the power commander that you have? I know it fits the pcv.
It doesn't appear to integrate with any of the PCV accessories... no Autotune and no quick shifter. 😬
If you tighten the clutch cable it will stop dying when slowing down
what if you put a juice box pro? i think you can upload power commander map with it
Oh I have a plan! Just waiting for parts to show up 💪
Dam so many squids going straight in a line
What are you getting for MPG with the 300 setup?
probably 2..... but 1000 smiles per gallon
If it's similar to a cbr 300 r it's probably around 70.
Here in finland there is this one dude who got 150km on honda monkey and wheelied on 120km
terooo!!
@@teme9132 tero tietenki
did you change all the wiring harness or just some cables ?
Shoulda put a carbureted engine in the bike so you don’t have any of those problems
that thing sounds nasty. do you still have it?
You in wichita? I just bought a navi and debating on doing a 232cc swap. 😂😂
9:13
Wasn’t this itsjusta6 old grim?
It sure is 🍻Tons of parts inbound for it!
Draujio mon n
i can see having one to put around town. anything else buy a big boys bike. prob a lot cheaper too
Love this shit!
Grom life 🤙
What kind of mile range do you get on a tank of gas?
Probably like 60 I'd say with the stock tank. The 125cc gets about 80-90
That kind of motorcycle can be driver in a highway?
Is it me or does that now 300cc look the same[ish speed as a standard grom, that engine should have at LEAST DOUBLE the HP just by the added CC but it does NOT LOOK TWICE AS FAST AS A STOCK GROM, Something i am missing or what and with 2 extra gears SCOOBS UK.
Run out of gearing or out of power to hit 100 plus?
What sprocket sizes did you decide to go with? Would you change anything? Any tips for someone considering doing this swap?
17 tooth sprocket showed improvement on stock engine