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Dirt Bike Brands - Other
WR/YZ 426F Weirdness...Help?
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[QUOTE="SFO, post: 105269, member: 21864"] I just pulled my 01wr426 apart to send Eric my cylinder for the O.S. bore connection. Surprise, surprise when I got the head off. The center intake valve has been clipping the edge of the piston cutout leaving a shiny rolled corner on the piston... The small end of the rod is also starting to gall. The piston pin is definetly toasted. The book says .016-.039" freeplay at this junction. This appears to be a misprint. I would personally set it up at .0015-.002"...It is at .0015"...This is actual mesured clearance, the manual is a bit ambiguous here. It doesn't call out how they are applying their dimensioning to reality. I hate designers...Just give me a drawing I will make it. Has anyone seen these things on a stock bike? Any insight would be considered. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
WR/YZ 426F Weirdness...Help?
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