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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Xr 70 Valve Adjustment Procedure
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[QUOTE="junkjeeps, post: 1233635, member: 26555"] You need to line up the timing marks on the flywheel and cam sprocket and have the piston at TDC(top dead center). From there adjust both intake and exhaust to .002" +/- .001"(I see you're from across the pond. I'm not sure what the MM conversion is). If your timing marks don't line up just right, check the timing chain for slack. It's not adjustable, you'll need a new one. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Xr 70 Valve Adjustment Procedure
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