hey i have a 1980 Honda XL80s dirt bike that doesn't want to rev up has limited power give it any more than half throttle it stutters at any rpm it likes mid revs only revs hi in first, the weird thing is it starts up perfectly and idles good first or second kick. doesn't run hot Carbs perfectly...
the ignition system is set to the f mark on the magneto when the exact moment the points open making correct spark timing it starts works idles as soon as i give it throttle or even leave it idling it looses spark when i try to take the magneto off its always a little stuck only after it looses...