2010 Polaris Sportsman 850 Service Manual, Page 125Get this manual
ENGINE Rocker ArmRocker Arm Shaft Inspection
12Mark or tag rocker arms and shafts to keep them in their respective locations for assemblySlide rocker arm shafts from carrier4Measure I.Dof rocker arms and O.Dof rocker arm shaftsMeasure shaft bore in cam carrierCompare to specifications (See "Engine Specifications EH085OLE013" on page 5.5)3Inspect each rocker arm rollerRoller surface should be smoothAxial movement should be minimalRoll smooth flat rod across the roller, applying firm downward pressure on roller while observing roller movementRoller should turn smoothly without bindingReplace rocker arm if roller surface is damaged, or if roller does not turn smoothlyFlat stock