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ttr 250 jetting

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My 2003 TTR 250 seems to stumble through most of range allthough it idles fine, most of time is stock jetting to lean or rich, if I add exhast will I need to lean or richen

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Stock jetting on bikes like the TTR250 are usually lean. Expect to richen the jetting when you add a more free flowing exhaust.

James

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