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Canadian Daves JustKDX
KDX 250 known for lack of top end ?
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[QUOTE="dirt bike dave, post: 1410307, member: 18302"] The cylinder for the US model '91 KDX250 is shown below. The view is from the intake side. The KIPS valve on this model has two side openings. A barrel with a groove opens and exposes an additional exhaust port on each side of the main exhaust port. The barrels are 12005 and 12005A. FWIW, the US model came with a 165 main jet and a 42 pilot. Most riders found big improvements with a 158 at sea level or a 155 at altitude, and a 38 pilot. If you want to get the most out of it, you also replaced your slide for one with 1mm more cutaway. Also, if the petc*ock is leaking and the bike is leaned over alot on the side stand, you can fill up the cylinder with fuel overnight. That'll foul plugs, and could even cause worse problems. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
KDX 250 known for lack of top end ?
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