2000 Polaris Indy 500 / 600 snowmobile service manual, Page 184Get this manual
CLUTCHES Drive Clutch Spider Indexing
NOTE: Spider indexing affects clutch balance and belt to sheave clearanceRead procedures carefully before proceeding1Before disassembling drive clutch, mark spider, cover, moveable sheave, and stationary sheave in line with permanent marker as shown2Disassemble drive clutch as described on page 5.14Take care to note the amount and thickness of the shim washers under the spider
3Add or remove spider washers as required to achieve desired belt to sheave clearanceS For example: If belt to sheave clearance is .020 too large, removing one .020 shim will position the movable sheave closer to the fixed sheave reducing belt to sheave clearance by .020 NOTE: The following washers are available for fine tuning: Washers: PN 5210754 PN 5210753 PN 5210752
.050 .032 .020