it would miss every other rev, when i first bought it, after that it stopped, that was my fault, but i replaced micro switch at throttle, i have replaced cdi box, coil, internal trigger coil, it will run for some times 20min, or only 1 min, i have alot of $ in this already but it needs to fix it, i think it is some relay or safety switch but what, i need help, by the way it is loosing spark