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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
92 kdx250 mods info needed
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[QUOTE="dirt bike dave, post: 1430433, member: 18302"] On the KDX250, the KIPS valve has two 'barrels', one on each side of the main exhaust port. When the side barrels rotate to the open postion, exhaust gas flows through them. On mine and my buddies, when the 'barrels' were fully open, the bottom of the opening in the barrel was not flush with the bottom of the exhaust port. Each of them was at least 2 mm above the bottom of the port. So I removed some material from the opening in the barrel to make the opening bigger. Hard to say if it made any improvement. In theory, it helped the top end power. On mine, there was also a whole bunch of casting slag in the intake tract of the cylinder, so I ground that off, too. I had a Boyesen Rad valve on it, also. After leaning the jetting out (a lot) and running a BR8E7 or BR7ES plug, I was pretty happy with the motor for trail work. Considering how pig rich it was jetted stock, the motor responded well to the minor mods. A six speed tranny would have been nice for dual sport riding, but the 5 speed box was fine for trail riding. As for the frame swap, I think it is very much worth considering, especially if you don't need the big KDX tank. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
92 kdx250 mods info needed
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