PTRider
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I'm running the idle mixture screw 1/4 turn in from where it is so rich the engine slows...turn slowly counterclockwise until the engine runs great, then runs slower, then turn the screw back in a 1/4 turn from the last point it ran the best.
I have about 1.5mm of spacers on the needle.
I'm using a 150 main jet.
I have the stock intake & exhaust. I don't think the K&N air filter element makes any difference except possibly when very clean at 100% throttle and high rpms, so the 150 main should cover that...if not, try one size bigger, but give the 150 a try. No intake gizmo makes any difference when the throttle is doing its job when part open--ya gott'a be wide open and high rpms to max-out the air flow in the intake. I'm not a K&N fan anyway; I think they pass more dirt than a stock filter and pass much less air when dirty than stock with an equal amount of dirt.
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