I had my carb apart and decided to drill the main jet to .027" it seems to have helped my engine power at high rpm but at low speed I picked up a surge or hunt. I thought this was caused by a lean condition? can a rich condition cause this as well? I am replacing the oil seals this weekend also. should I put a stock jet back in or is it likely that the richening didn't cause it? this is a silver model 10304....
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