This machine is starting to drive me nuts. At times it runs perfectly, starts fine when its cold, actually springs to life. goes 35 mph (albeit with a slight tailwind). I've changed everything, plug, new bearings, new rings, new centrifigal clutch, (it definitely does not slip), thoroughly cleaned the carb, put new gas in etc. etc. etc.
Most recently changed the coil, because it was cutting out intermittently, now it doesn't cut out. Throttle linkage is good...........should run perfectly right? Wrong, here's what happens.....After running a good 10-15 minutes, when its thoroughly hot, if I shut the thing off, it just will not restart. it turns over, and over and over, until the battery nearly dies (its a newish battery too) but will not fire.
How is this possible, it was just running perfectly a few minutes before. Now heres the weird part. If I leave the scooter for say 1-2 hours or overnight, and let it thoroughly cool down..........It fires right up as though there was no problem !!!!! Why would it do that ??????
One other thing I've noticed and I don't know if its related to the starting problem but maybe it might give you a clue as to whats going on here. After 10-15 minutes of riding, when the engine is thoroughly hot, if I stop at a light or stop sign When I start off again.....add some throttle, the engine won't accelerate its usual fast rate, but sort of bogs down, I have to add throttle very slowly to get the scooter moving again, and after accelerating very very slowly, it'll suddenly pick up quickly and then go back to its normal fast acceleration rate and speed. Whats up here? Anybody know? Its definitely not clutch related.
Could it be a choke circuit that comes on, when it shouldn't, or is it more likely carb related ? Exhaust port or muffler is not plugged. Thats been changed too.
Any suggestions or insight would be greatly appreciated