1997 Ski-Doo Factory Shop Manual Volume One, Page 72Get this manual
Sub-Section 03
Section 03 ENGINE (377, 443 AND 503 ENGINE TYPES)
A01C01A
1Exhaust
A21C01A
Remove piston pin puller and expansion sleeve Install circlips as described below When installing new needle bearing, insert needles with thrust washersInstead of expansion sleeve, needles are held in place by inner plastic cage halves Use piston pin puller (P529 0210 00) to insert piston pinPlastic halves should come off pistonIf not, pull them out using long nose pliers
All Engines Except 503 To center the piston pin with the connecting rod bearing, use centering tool (P529 0091 00)
529 0091 00