OK so here's the problem. I took my bike out for the first big ride the other day, and as I was slowing down at one point it just started to rev the piss out of itself with the clutch pulled in. Not knowing what was going on, I hit the kill switch and nothing happenned, it just kept revving the piss out of itself. I ended up coming to a stop and then with the rear brake on I fed the clutch out in 1st gear and managed to stall the engine (without much effort). Put the kill switch back to "run" and it started up again and everything was fine.
During my whole ride it would, every now and then, seemingly quite randomly but perhaps more while decelerating, all of a sudden surge forward and want to rev itself silly again. As soon as it would I'd just lock up the rear wheel and stall the engine and then it would start itself again once I let off the brake(while rolling) and everything was fine for a while.
Doesn't seem like it has much power to rev itself, like it doesn't feel like it's staying WFO, just enough to surge ahead, feels like maybe it's staying 10-20% open or so with the throttle.
I'm thinking it's just a matter of cleaning the carb out in case the throttle is staying stuck open or something BUT, the thing that's really worrying me is that when it starts to rev itself, I can't kill it with the kill switch, which is really weird because the kill switch works perfect all other times. It's almost as if the engine is dieseling.
Anywhoo my first step will be to take the carb apart and clean it all out and check the jetting, lube the throttle cable etc., but I wanted to throw this problem out there in case anyone has any other ideas/theories about what the problem might be, and if there's anything in particular I need to check while the bike is apart.
It's an air-cooled '83 motor in case that makes any difference.