2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 79Get this manual

2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 79

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ENGINE (300) 23 Replace the main bearings if the components fail visual inspectionThe connecting rod utilizes roller bearingClearance can be measured with dial indicator to check radial clearanceVisua