2wheelkid
New Member
Hey guys, got a 1979 GS550 all stock motor except for k&n pod filters, 5 steps up in main jets. Runs great and pulls hard until it hits 6k rpm. And it just Falls flat on its face. Already checked & replaced plugs, checked valve clearance, coils. Cleaned the carbs really good and replaced all the o-rings. Any ideas?
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