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Dirt Bike Brands - Other
yz400 stumper...
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[QUOTE="biglou, post: 61849"] A beginner's stab at things here: Someone mentioned the sticking valve issue already. I am not familiar with the valve train on these, ie: single or dual cam, etc., but, is it possible that the intake cam assy or cam gear has slipped, thus causing an open valve situation as the piston is heading upward? This would seem to give the feel of lowered compression since, in fact, it is not allowing the piston to compress against a sealed cylinder. ------------------ 2000 DRZ400E [/QUOTE]
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Dirt Bike Brands - Other
yz400 stumper...
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