49cc 7G T-Belt Transmission Common Problem and Easy Fix
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- Опубликовано: 19 янв 2021
- Watch as we diagnose an ill 49cc 7G T-Belt Transmission. Difficult, frustrating problem with an easy fix.
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Thanks for publishing this you saved me I was about the change my clutch I tear down everything even clutch itself to see the problem but I couldn’t se anything now I know why thank you very much :) you saved me as a student :)
I was fighting with the o-lite bushing problem since the '70s, when I worked on legacy 3M industrial products. Replacing them with a real bearing was my preferred solution. Sometimes the only option was cleaning the bushing with a piece of rolled up green Scotchbrite soaked in clean oil. Oil, not grease, is what worked best for me, and it was a reular maintenaince item. Inspection for wear and replacement was required. In the '80s new delrin bushings were available for replacements, but were only used where heat was not an issue.
I'm having this problem now lol. Not use to the 7G's every T-belt ive had are the 4G's. New engine came with the 7G. Super hard to push and starts up when I'm pushing it to. Glad i found this video did it last night. Gonna install it in the morning
I agree about soaking the bushing not doing anything. They are not sintered, but solid metal. Using a good grease is much better. Just gotta be careful not to use too much and contaminate clutch pads. A spiral groove cut into the bushing will also help retain grease longer
I got one of those 53cv 4 stroke motors and I put it on my huffy Cranbrook , it worked fine for the first couple days and I didn't ride it much at all and I knew about how not to go very fast so everything will seat properly , but the 3rd day I started it up and it seemed like everything was fine , so i shut it off and went in and grabbed the things i needed and i tried starting it again and the back tire wouldn't move ! It was the last thing I thought of , but I just watched your video and I'm going to try that tomorrow ! So wish me luck ! Thanks for sharing by the way ! Peace
Thanks for this info.
I have not notice on my one. Will check. The output sprocket on my one is a freewheel type.
Haven't had this problem yet, but great information to have nonetheless, thanks for sharing.
Do you have this problem actually?
Thank you keep up the good work
Thanks brother, I started building bikes and I have one daily four stroke this I hope is my problem!
My bike is still enganging but feels a hell of a lot better. Is my clutch sticking?
I just realized that you're the same person that does establish check updates that's awesome LOL
This is been a problem I've been trying to figure out since I bought the motor I thought it was natural but I would see people with their bikes just sitting idling I would have to start it and instantly start writing thank you very much. Now I can enjoy this bike. Because it's been a pain in the ass trying to start
You can also look at the idle bracket if you have the stock setup. Sometimes the idle bracket is not setback far enough. If that is the case, use a spring to counter pull the idle bracket back so that your idle can be lowered more. Hope this helps! Happy building.
Good looking bike and normaly I prefer the look of two strokes but that engine looks good on there! Chrome or you know metal on black just looks good! I would personally try and do away with the red cover but I get that it sort of ties the red of the tires in! All in all it's a good looker!!!
I wonder if soaking the bushing in zMAX would get you more than 10 hours between service. Just a thought thanks I enjoyed the show
thank you on thissss... 🙌
Do the G8's have the same problem? I just bought one, but haven't tried it out yet. Is that the Engine with the built-in centrifugal clutch or does that have the 5/8 shaft?
Is the bearing supposed to spin feely after u tighten the bolt i might have mine go tight?
I had that center gold bushing flange completely break while attempting to remove it. It's worn off to where there isn't a flange, how do I get that out now as it will need to be replaced?
How do you replace the clutch pads?
Thanks for the video it truly help me today. Will be trying this tip in the morning.
Question: do you change out your stock spark plug? If so , what plug would you suggest
Another great motorized bicycle channel, Hughes Motorized, mentioned to change it out for a NGK cr7hsa. I don't know much about spark plugs, but I know that the company NGK is one of if not THE best spark plug company!
@@adamcolbertmusic yes it is! also is slightly hotter plug/= doesnt foul out as easily on 10% ethnol... only down side is =100 miles streight at max throttle- stand a small chance burn hole in allum piston! vibration stops me from max throttle ever and def.. not for long.. : so i dont worry! hotter plugs are awesome/sometimes called oil burners - if old and leaks oil past .. it just keeps going !!! :>)
where can i get the bearing for intide the oilite bushing i literally cannot find one
Buen videos gracias brother
Usted tiene un bicimotor con esta transmisión?
Well it do any good to ask a question?. I got one problem started sounding like a loose bolt in the motor at a stop low RPM get bike going runs fine grew worse come a stop thing has like metal scraping now can't get a pull start sounds like metal a scraping try to push it then snags metal scraping any know what it is and the solution?
I have a question, what does the "#G" mean for belt drive transmissions? I've heard about 4G, this 7G and 8G, but what does it mean? I want to get one but don't know which to buy
Thanks for the tip! Exactly my issues, which a new clutch didn't fix. Got any experience with having to hold throttle slightly on, to start? Maybe after oiling the bearing, I can just set the idle speed higher.
Did you prime the engine beforehand? I like to make a few very V E R Y slow pulls at half throttle to get some fuel in the cylinder, and then give it a few fast ones with no throttle to start it. Hopefully that can help your starting issue. It certainly helped mine. It certainly beats having to give the engine fifteen pulls to start it even with the choke on.
@@thepedalkickers2701 No, but I've wished for an accelerator pump like carbureted car engines have, to prime it. Mine starts pretty well with just a little throttle opening, but the problem is I need three hands - one to pull the starter cord, one to crack the throttle open, and one to hold the brake on. Being one hand short, I position the front wheel against something that won't move, which means I need only two hands. I had one of the electric start two-strokes, which was nice, but...two-stroke. Is an electric starrt, fuel injected four stroke, for $100., too much to ask? Let me dream on.
@@stephenandloriyoung5716 Oh, I thought it would have a carburetor.
Does anyone know where I can find the bushing the night and everything else mine fell apart while riding it through town and I lost everything
please make a video how to put 2 storke carburator on that huasheng 49 cc engine
Never had this problem with the dual chain transmission. Only the occasional clutch adjustment if that. 🤔
yea, really needs a new sty;e clutch like the 212 cc duel belt pully.... like a golf kart only smaller... takes off easy.. like geared lower for power take off/ then as faster it opposite/ =15 mph faster top ends as well ! just they not made for smaller shafts yet!
Would you recommend doing this during the install? I recently purchased a larger 4 stroke for my bike that comes with that same transmission , so I'm wondering if I can completely avoid the problem by doing this at installation.
Thank you
Yes, absolutely. It takes 5 minutes. White lithium grease actually has turned out to work better and for longer.
@@SouthernCustomCC thanks so much for the quick reply. I'm stepping up to a larger engine, I had a 49cc 142f , now I'll be using an 80cc 4 stroke, anything else I should be aware of
Currently in mortal combat with this exact problem. I got ahead of you before I found this video and have removed both pulleys and the bell and found 1 of the shoes was flopping around loose. Could the bushing problem be the cause of the broken spring? I know that bushing has never been greased but only has maybe 20 hours on it or less. Any feedback is greatly appreciated.
Definitely could be due to constant engine engagement. And, yes, that bushing needs to be lubed constantly; so 20 hours could have caused that.
What does sitting overnight do to improve performance?
Just let's the poars in the metal really capture the oil. You can also use white lithium grease as well.
would be better if you use heavy duty lucas gear grease i used it on mine and put about 900miles on my bike in the last 4 weeks and doesn't have that issue.. also any advice on how to keep that bolt from coming lose that is another very common accorance with that i lost my copper bushing and washer bushing earlier today coming home from work that's my main issue with it and the clutch pads keep coming lose from the bolts on the clutch pad mount
Some use lithium white, gear, and/or oil. I have my used Lucas specifically. I'll give it a try, thanks!
@@SouthernCustomCC your welcome
I just put my 4 stroke build together. It moves freely when pushing the bike but with engine running it seems to always be engaged. Slowly but surely it seems to be getting better but I might do this trick if it doesn’t stop engaging at idle
sounds like weak clutch springs.. most spend the xtra for a 5 pad clutch/ vs the 3 pad weaker 1..
What is the information on that belt drive what is all the white numbers and letters what is the exact name of that building that's what I need
Is my clutch supposed to be always engaged???on a 4 stroke
No. Check your throttle cable length. Then check your idle screw. Then check your cable stopper at the carb. Then check your oiled bush bearing. Lube that up and it should help. Clutch springs, if you have the pocket bike transmission, could be too stiff.
Why did you not just grease them with lithium? That is what the brass Babbitt bushings are made to run with. You sprayed some form of degreaser like wd40 or they never had grease to start with and of course they will stick if there is no grease! Oil is not going to last very long on this surface it's not a cast iron Babbitt bushing!
For the life of me I cannot find the part that fits in the oilite bushing and it’s pissing me off. I figured out a fix for it but its eatinf at the oilite bushing
I tried this but rear tire keeps spinning whrn i lift it when its down it wsnt to taje off anymore i can do to stop this ?
Make sure that your throttle linkage is not engaging the carb and opening up he flow of air/gas. This would cause the tire to spin. Another possibility is adjusting the idle screw to a lower rpm. Another suggestion is using white lithium grease on the bushing. All are possibilities. I'd start with the first one.
Thank alot ill start on those hopefully one of those will work
@@SouthernCustomCC i can't idle it down anymore without it dying jll get lithium grease let you know what happens
Try having the bushing hot when you put it in the oil. It will soak in oil better as it cools.
yup : 100k . bushings on pwer plant= boiled in oil 30 min.. just till start to boil.. tiny bubbles. :>)
A case of a tuber who doesn't know what he's talking about. These kits come standard with brass bushings, not olite. Brass bushings use grease only, not oil. The problem is the brass bushing runs out of grease and then has a tendency to lock up. The solution is to periodically apply grease to the brass bushing, or modify the clutchbell to accept an olite bushing.
Doesnt look like a good design if it requires so much maintenance lol
I’d love to get rid of the centrifugal clutch! Jerky and noisy!
No homo this saved meeee
I thought the bike was suppsoed to turn over the engine like that every pedal during break innnnn
Where Can replacement belts be purchased?
Here you go, boss::
www.gasbike.net/products/transmission-belt-for-7g
Thanks for watching
You should take a look at my channel I just did a hyper with motorized mag wheels and front disc brake setup
I know you mean well but grease should never be used with oilite bushings because it inhibits the flow of oil in and out of the bushing which is porous. The recommended oil for impregnation of the bushing is 30 wt.
@@WillB-lv1xg Well you have to first know whether you have a bronze or Oilite bushing before applying anything to it. Soaking a bronze bushing in oil is useless. Oil is for the Oilte bushing and grease is for the bronze bushing. The tuber here applied both grease and oil. Grease is a big mistake for an oilite bushing which he should know.
A friend that has the same engine without the belt drive never has that problem at all. To do that every 10 miles is a joke.
Just removed the bushing replace it with roller bearing..thats the latest set up here in philippines..no more maintaining grease..
What size roller bearing? Where can I purchase those? Would love to upgrade my kits with those bearings. Thanks for the info
I see that im gonna order those bearings myself and try it any tricks or hints i should know i couldn't really understand the video? Did they just get rid of the bronze fitting?
@@SouthernCustomCC 21mmx15mmx4mm
Who da Tipster?
Put a freewheel on it anyways it's shit like that get it on the rear sprocket
You forgot to add in your video apply
BLUE THREAD-LOCK TO THE RETURNED BOLTS!
I ran out of the substance and thought I would be ok, I took a 70-mile round trip along the interstate in a thunderstorm both bolts came out destroying my cover plate and the woodruff key lucky there was an O'Reilly's store with en 2 miles of all that vastness!
Soaking the bushing? That's crazy!!!!👎
Be sure to grease the brakes while your at it and slide in for stop!
You give good info on your videos, but I suggest you that you eliminated the nasty rock and roll that you play during some sections. Its unpleasant and very annoying!