QuestionBIKE RUNS WELL FOR 10-15MINUTES THEN WONT IDLE & BACKFIRES. LET IT COOL DOWN THEN OK AGAIN FOR 10-15 THEN TROUBLE AGAIN.JUST DONE FULL ENGINE REBORE AND OVERHAUL.
PLEEEEEEASE HELP TRIED ALL I CAN THINK OF.
AnswerHi Bruce,
I suspect the engine is overheating. There's not enough information to accurately diagnose the problem.
Upon reassembly of the engine, how was air purged from the cooling system?
What are cylinder compression readings? Was a leak-down performed after the rebore? What are the piston sizes now?
Are valve clearances within service limits?
Describe the appearance of the spark plugs. Cylinders, carburetors, and plugs are numbered 1-2-3-4 from left to right as if seated in the saddle.
Reply to my questions. We'll go from there. I return tech information files by email. There was no email address with your question as requested and explained in my instructions.
Respectfully,
Mark Shively
