2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 107Get this manual

2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 107

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CYLINDER HEADVALVES
EXCESSIVE NOISE

Incorrect valve clearance Sticking valve or broken v(llve spring Excessive worn va lve seat Worn or damaged rocker arm or camshaft Loose or worn