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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Stock Jet sizes for '99 220
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[QUOTE="D_Moen, post: 1207769, member: 77430"] Hi all, I gritted my teeth and dug into my carb today. This KDX is my first 2 stroke dirt-bike and I was not happy with the throttle response. A quick check of the plug revealed that the bike was running pretty rich. I read the tech tips on the Just KDX site and headed out to check my jetting. With an FMF pipe/silencer and airbox lid removal, the site reccomends a 145-148 main jet and the stock needle in the second slot from the top. My bike has a 150 in it! Dropping the needle and tweaking the low-speed air-screw seems to have brought the bottom end to life. Does anyone know what sizes of low-speed and main jets a '99 220 would have come with? When I change jets should I just go down one size at a time? Can I compensate for what seems to be an overly large main jet by dropping the needle farther? Thanks for your help! [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Stock Jet sizes for '99 220
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