2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 65Get this manual

2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 65

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ENGINE (300) Combustion Chamber Inspection
Valve Inspection
12 Remove all carbon from valve with soft wire wheelCheck valve face for runout, pitting, and burnt spotsTo check for bent valve