Recommendation for New Build

CrazyDan

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Joined
Jul 9, 2016
Messages
2,274
That kit will work for a while, but you will find yourself replacing parts (from the kit and damaged bike parts, caused by the kit). That transmission is a knockoff of the 4g, and you will find it much less reliable. If you buy the parts individually instead of getting the kit and upgrading as things break, it'll be cheaper in the long run. Get a ball bearing throttle, a good heavy duty mounting plate, a good tranny, a good rear wheel that takes disc or rim brakes (disc brake mount will be for the sprocket, so you will need rim brakes or use math to get the right tophat adapter). There are better gas tanks available than what comes in the kits. A suspension fork helps tons for bad roads, or off-roading. Get all your nuts and bolts from the hardware store, don't be cheap and get 12.9 grade for high torque spots.
Pay for it up front or pay for garbage and the good stuff later. Make sure you can stop before you go, brakes are your friend. Cheaping out can hurt (or kill you). One last note: remove or seriously brace your front fender, those things are dangerous.
 


gary55

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Joined
Nov 27, 2012
Messages
3,894
I agree with everything that Dan says above accept I think he meant a bearing clutch bell.:)The trans in the kit you posted looks like it doesn't even have a belt adjustment. You can bet it's a bushing rather than a bearing at the clutch bell. 1 more thing to constantly need maintenance. He along with others on this forum have been riding these 4 strokes for 1000's of miles and know what works, what don't work, and what saves you lots of money with fewer break downs in the long run. Save now and you will pay more tomorrow.
 
Joined
Mar 3, 2019
Messages
15
What is a "rag joint" is that on the engine or with the kit?:unsure: I tired to find a kit with a belt drive so far no luck. Could you provide a link to one? What is a "single chain transmission" ... like a one speed? Is the bike I'm choosing going to need those disc brakes? Are they available for that model bike? Will it be okay without the disc brakes?
A "rag joint" is the assembly which consist of 2 rubber grommets which bolt the sprocket to the spokes on the wheel and is included in almost all engine kits.

It can be tricky to get it trued up correctly, some other options are: use a sprocket which replaces the rear disc brake (requires a bike with a disc brake hub, having wheels built can be expensive), or you can use a hub adapter, which clamps to the hub instead of the spokes (around $80)

That being said there are a lot of people who just use the rag joint and it will work fine, if you are patient enough do do it right.
 

spirittoo

Active Member
Joined
May 18, 2019
Messages
135
That kit will work for a while, but you will find yourself replacing parts (from the kit and damaged bike parts, caused by the kit). That transmission is a knockoff of the 4g, and you will find it much less reliable. If you buy the parts individually instead of getting the kit and upgrading as things break, it'll be cheaper in the long run. Get a ball bearing throttle, a good heavy duty mounting plate, a good tranny, a good rear wheel that takes disc or rim brakes (disc brake mount will be for the sprocket, so you will need rim brakes or use math to get the right tophat adapter). There are better gas tanks available than what comes in the kits. A suspension fork helps tons for bad roads, or off-roading. Get all your nuts and bolts from the hardware store, don't be cheap and get 12.9 grade for high torque spots.
Pay for it up front or pay for garbage and the good stuff later. Make sure you can stop before you go, brakes are your friend. Cheaping out can hurt (or kill you). One last note: remove or seriously brace your front fender, those things are dangerous.
Getting all those parts separately would be cheaper than the kit you linked to or more? The parts in the kit have all those things you mention? What about this transmission pulley size ... 80 or 100 tooth how would I know which one to get? You say the company backs their product ... so if something breaks they will replace it? Are there any videos that shows how to put that particular kit together? What do you mean by bracing the front fender ... how would that be done? How could it be dangerous?:unsure:
 
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gary55

Well-Known Member
Joined
Nov 27, 2012
Messages
3,894
No not really. The one I showed you is good quality. For 50 dollars more you get a way better setup. The bell rides on bearings instead of a bushing, the cranks are better quality, the transmission is better quality with better belt tension adjustment, and it includes the European bottom bracket adapter. Plus gGasbike is a crappy company to deal with. Bicycleengines.com is a excelent company to deal with. If their was a problem with anything Gasbike or kings motorbikes will give you the run around for months once you finally get them to answer you. Bicycle engines.com will promptly make things right, but thier will most likely not be any issues with them to begin with. 49cc 4G T Belt Drive Complete Gas Powered Engine Kit - Bicycle-Engines.com
 

spirittoo

Active Member
Joined
May 18, 2019
Messages
135
What about the tooth count? Should I get the 80 or 100 tooth? Is this the same engine with the same backing being sold though amazon? Will this video be a good guide to installing the 4G? What about tech support from Bicycle-Engines?
 
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