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What main jet with stock needle ????????????????

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I have the klx400sr with stock cv carb and a stock needle shimmed up 060 .I have done the 3x3 airbox mod and a full scorpion exhaust I am about 500 feet above sea level .I currently am running a 150 main jet and stock pilot jet with the airscrew about 2 3/4 turns out with stock airfilter no other engine mods. should I go with a larger main jet maybe like a 155 Or should I leave well enough alone Any suggestions :cry:

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