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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Kdx220 Jetting Problem
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[QUOTE="Rich Rohrich, post: 1445990, member: 16241"] Sounds like it's still too rich on the needle and possibly the pilot jet as well. Given that it's an older bike it's worthwhile to check for wear on the needle and the needle jet. You can't hurt the engine from running too lean a pilot jet, and in almost all cases that will be true of the needle position as well as long as the needle jet has enough area to feed the main at WOT, but that's easy to verify. For the type of riding conditions most will encounter the worst that comes from being too lean on the pilot is a hesitation/bog. If you get way too lean on the needle it will be obvious from the performance most of the time. Worst case on the needle posiiton being too lean is possibly some spark knock in low speed, high load situations where the throttle is open past 1/2 and maybe a throttle run on coming down from high speeds. No one ever broke an engine from running too lean on the pilot. Lean is good in the low speed portion of the fuel curve. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Kdx220 Jetting Problem
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