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DR Pop, too rich?

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Ok the bike has the air box mod, 140 main jet, fuel screw 2.5 turns out and Supertrapp stainless exhaust. Finally had the bike out this weekend and was running fine. . Temps were about 95 degrees in the shade.

I noticed when really hard on the throttle shifting from 1st to second when I let the the throttle I would get a destinct pop from the exhaust just after letting off the trottle to nail 2nd. Am I running too rich?

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