1984 200m glowing red header

[1984 honda 200s]

Well ive got a new project pretty well complete, ive got an 84 200m engine stock bore AND IT DONT BURN OIL in a 87' quadsport frame.
It runs so well, spark plug is tan but after only minutes of riding the whole header turns glowing red ( header is a crf230f).
Unsure what would do this, is it out of time on the pulse rotor or on the cam itself?? Exhaust is free flowing, no obstructions, clean air filter...

[xman2rman]

Sounds like the cam chain/sprocket is one tooth off. I wouldn't run it any more till you get it fixed. I did the same thing on my first 200x engine years ago. It cranked right up and I took a little spin around the yard at dusk. The head pipe was glowing cherry red! Just had the cam off by one tooth.

[1984 honda 200s]

Alright, i'll give it a look over, i absolutly hate how the flywheel is tucked in from the timing window ~!

[dougspcs]

Timing is timing..

Could be the ignition timing also..might as well check both.