2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 199Get this manual
PVT System Roller Removal
ROLLER PIN SPIDER ROLLER WASHER
10Measure the width of the spider leg with the buttons installed (9) and record the measurementSpecification is 1.496" (37.99mm)
11Measure the width of the moveable sheave towersSpecification is 1.50" (38.1mm)SHIM BUTTON