Two stroke bicycle engine bucking bar clutch problem

[JerboaJohn]

sounds freaky,, what about something wrong with the bucking bar n ball? not likely but maybe look into if it's not the chain hitting??
other than those things the little bearings in the clutch assembly can be smooshed and come out. a new clutch isn't expensive

 

[Will'smotobikes19]

These bucking bar problems are odd to me I've never encountered it. Among the other problems. Improper length? I think the inner spring is adjustable or something might be off. Theres collars on the shaft.

 

[willdoucette]

Thanks for all the replies everyone, I am trying all your suggestions now. However I have ran into another problem. My bike is old school, it was my grandparents from over 50 years ago, and the tubes where I mounted my engine are too small for the engine fitting clamp and screws... so the entire engine can wiggle around. How can I secure the engine to the bike frame better? I have tightened the screws and nuts all the way but the bike frame tubes r just too small

 

[Will'smotobikes19]

halved pvc pipe.

 

[JerboaJohn]

wow thin frame, , you'll have a bumpy ride lol. section of garden hose could do it also

 

[gary55]

Thanks for all the replies everyone, I am trying all your suggestions now. However I have ran into another problem. My bike is old school, it was my grandparents from over 50 years ago, and the tubes where I mounted my engine are too small for the engine fitting clamp and screws... so the entire engine can wiggle around. How can I secure the engine to the bike frame better? I have tightened the screws and nuts all the way but the bike frame tubes r just too small

I would split some metal tubing to shim out to a clampable OD.. PVC may last a while, but garden hose will get eaten quickly. Metal to metal is the best mount.

 

[JerboaJohn]

may be moot bcs the frame might not stand up to being motorized for long.

 

[Greg58]

Copper tubing can be used, EMT conduit is another choice. Make sure the rear mount is solid, if not you'll have a lot of problems. It sounds like a small diameter frame with a engine kit for a large frame. We used to have the reverse problem, about ten years ago all kits were designed for small frame tubes, bike tubing size has increased a lot since. If your kit came with a front mount adapter you may have to drill holes and use a smaller u-bolt.

 

[gary55]

On the front mount you can you can make a adapter using a Muffler clamp that fits your down tube and some 3/16"
steel. I would still use the split metal tubing as a shim though. It protects the frame from pinch and vibration wear.
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