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Help! Running rich on left cylinder only


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I have a 1999 banshee with keihin pj34's with 140 mains and 58 pilots and the air screw set out at 1.5 turns on both carbs as well as the needle position being the same on both carbs. Also has v-force 3 reeds. Compression is dead even on both cylinders and have switched spark plugs and spark plug wires and the left cylinder still runs richer than the right. Both exhausts are exactly the same and not leaking anywhere. Has new rings and gaskets. The right cylinder is running perfect. The left cylinder is always running richer whether it's at idle or wide open. The only thing I can think of is reeds but I have no idea how to check them and if they even make a difference in the fuel ratio? Might also switch carbs to see if it changes. Any suggestions?

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