Quote:
Originally Posted by Triple Jim
Cam timing error seems most likely. I've also seen very incorrect ignition timing cause symptoms like this, but it would have to be way off somehow. Like maybe spark plug wires mixed up.
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When I installed the wiring system, I could only install the ignition coils a certain way. And the ignition coils are the same right and left, as well as I don’t think th polarity of the ignition coils matters does it?
I was thinking it might be the air/fuel mixture but the way It ran was weird, it would like rumble for the 3 strokes an then backfire and repeat.
I went over my clearances again and I noticed one was out of spec. Bought the wrong shim for it and made it .15mm clearance rather than .25mm clearance for the exhaust valves. Could this have caused the issue?