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When to start changing pilot jets


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Anytime you alter the amount and speed of air moving through the motor (pipes, intake mods, porting, etc...), jetting adjustments are neessary. Some pipes like a fatter pilot, some dont. Your can "read" your plugs to see if your jetting is accurate. Do a search on here, and you will find hundreds of posts on how to read plugs.

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I find the more all around pipes don't need anything more than a stock pilot, but the more high rev pipes need 1 or 2 sizes larger. Porting will sometimes tend to want a larger pilot as well depending on the porting....Cold weather conditions will also require larger pilots and help the shee start a lot easier... as for plug reading. I run it wot in 6th gear for 5-10 seconds, kill it, coast to a stop, pull the plug and examine the ground strap...black is rich, dark brown is perfect, tan is lean....others will examine the inside porcelain, which to each and their own.

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