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Hello Folks, this is on my 85 Le Mans, after riding it for about 20 minutes, Intermittently,the idle will become very rough, sometimes the engine dies. I have checked timing, valve clearances, plugs look fine, I have newer ngk caps and wires, carbs are fine, recent synch checked, and spot on. Yesterday when it did it, i realized it sounded like it was running on only one cylinder, so I reached down , and pulled the left plug cap, it had no effect on the running, after getting the cap close to the plug a few times, it started firing, and ran perfect after that. It seems to me the left cylinder drops out intermittently , but only at idle. I have some yellow/orange colored coils that look like the dyna coils in shape. I am not sure what brand. Any suggestions where to start diagnosing the culprit here?Thanks alot!Rick.
I was having pretty much the same symptoms my SP. Misfires happened on both sides, which made it hard to isolate which cylinder was at fault. Poor idle , hesitation, engine stalling after warming up. In any case, off came the Dyna and, after futzing around setting up the points plate and resetting the timing with a timing light, the bike went back to running normally. Still thinking about sending the Dyna stuff back to the manufacturer for testing, but perhaps the points are staying on the bike.