1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 290Get this manual
ENGINES Magnum Engine DisassemblyInspection 4Measure O.Dof rocker shaftInspect it for wear or damageMeasure I.Dof each rocker armMeasure I.Dof both rocker arm shaft supports and visually inspect surfaceInspect 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