2010 Polaris Sportsman 850 Service Manual, Page 143Get this manual

2010 Polaris Sportsman 850 Service Manual, Page 143

ENGINE CrankshaftCam Chain Removal 1Remove crankshaft with cam chain and end seals Crankshaft Inspection 1Visually inspect
Main Journal Diameter: 2.16422.1650" (54.97054.990 mm)Crankshaft Main Journal Concentricity: 0.00027" (0.007 mm) Out Of Round
Cam ChainSprocket Inspection 1Cam chain should be replaced if damage is evident or if sprockets show visible signs of wearInspect
drive and driven sprocket as shown below BConnecting Rod Journal Diameter: 1.77181.7726" (45.00545.025 mm)Connecting Rod
Journal Concentricity: 0.00027" (0.007 mm) Out Of RoundMaximum Runout: .001" (.025 mm) 3Support crankshaft on V-blocks or
on-centers in crankshaft stand or latheMeasure crankshaft runout (E) and replace if runout exceeds maximum listed above Crankcase