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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Is this plausable?
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[QUOTE="Dirtdame, post: 1405037, member: 119586"] That little arm that comes up out of the primary/clutch cover and disappears into the side of your cylinder connects to the powervalve system. There are two valves and corresponding little ports on either side of the exhaust port that are closed at low RPM, then cetrifugal force from the crank as the RPMs increase causes the lever to pull those valves open to move the air/fuel through the motor better at high RPMs. If those are not timed right or are sticking, it would cut down on top end power. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Is this plausable?
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