2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 76Get this manual
ENGINE 4Measure I.Dof each rocker arm and compare to specifications3Loosen three camshaft sprocket bolts
4Rocker Shaft Oil Clearance: Std: .0008.0021 (.020-.054 mm) Limit: .0039" (.10 mm) 567Measure I.Dof both rocker arm shaft supports and visually inspect surfaceCompare to specificationsSubtract rocker shaft O.Dfrom rocker armshaft support I.DThis is the oil clearanceCompare to specificationsInspect rocker adjuster screws for wear, pitting, or damage to threads of the adjuster or locknutReplace all worn or damaged partsNOTE: The end of the adjuster screw is hardened and cannot be ground or re-faced