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kfx 400 jetting??

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I have a 03 kfx 400. I have installed the pro design air filter adapter with a clamp on K&N, removed the screen in the intake hose, and took the air box lid off. I am running the stock exhaust. I have tried many different sizes of jets from a 150 to a 180 and they all seem to run the same, but my plug is still kinda white. Elevations is 1600. what size of main do you recomend for my setup.

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Try moving the carburetor needle clip down 1 step to lift the needle and run a #165 main jet. You should feel and improvement in the mid-throttle range and the top should rev out well.

James

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