2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 231Get this manual
CLUTCHING 5Inspect surface of shaft for pitting, grooves, or damageMeasure the outside diameter and compare to specificationsReplace the drive clutch assembly if shaft is worn or damaged
Moveable Sheave Bushing Inspection
Inspect the Teflon coating (arrow) on the moveable sheave bushingInspect both sheaves for signs of wear, grooving or crackingDe-glaze sheave surfaces with 3M Scotch-Brite Pad if needed
= In mmShaft Diameter: Standard: 1.37451.375 Service Limit: 1.3730" 6Visually inspect PTFE thrust washer for damageMeasure the thickness and compare to specificationReplace if worn or damaged