2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 85Get this manual

2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 85

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ENGINE (300) 7 Install the flywheel key and flywheel

Piston Ring Installation
NOTE: Apply clean engine oil to all ring surfaces and ring landsAlways check piston ring installed gap