Centrifugal clutch not gripping well? Answered
I mounted a rototiller engine (Tecumseh TC300 or TC200 I think) on a bicycle after un-siezing every moving part on it, cleaning the carb etc. It seems to run well and starts very easy. But for some reason it won't make the bike move. When it's at full throttle the engine doesn't bog down or anything but smoke was coming from the centrifugal clutch and it didn't move the bike. The wheel on the bike spins if lifted off the ground but stops under any resistance. I don't think the gear ratio is to wide but that might be part of the problem.
I think the clutch is not gripping well, but it looks exactly like the new one that I looked at. There is no friction pad on the shoe, just steel on steel. Should I try cutting a cross-hatch into the shoes and drum of the clutch or is there a better way? Mabey something I'm overlooking?
The problem was the gear ratio. I have made it much narrower and the bike works now, but it has little torque espciaaly below about 5 mph. So I will make the gear ratio even narrower.