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Canadian Daves JustKDX
KIPS valve keep stripping
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[QUOTE="BucKat, post: 358654, member: 29199"] No coolant losses or boiling over. The crack does not go that far up the cylinder. The crack is just behind the spot where the center exhaust valve sits. The cylinder wall is thinner here to accomodate the valve. Removing the center valve and pipe gives a good view of this spot. CD I'm pretty confindent that the center valve has never seized. There is no appartent damage to it. The left valve stripps and the right valve became seized and caused it to break in two places. 3 possibilities for these conditions. 1 the holes in the collars and bottom of the bores are too big. 2 head gasket causes over heating near the valve resulting in seizure 3 I noticed that the governor rod can rotate slightly. This causes the threads on the rod and the left valve to bind..The action of the KIPS system is pretty strong and the governor rod will absolutely want to slam the valves open.Something has to give and in this case it would be the weaker aluminum thread on the valve. The quest continues. Parts should be in tomorrow and if all goes well I'll be testing her this weekend. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
KIPS valve keep stripping
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