1999 Ski-Doo Factory Shop Manual Volume One, Page 110Get this manual
Section 04 ENGINE Subsection 03 (377, 443 AND 503 ENGINE TYPES)
Insert piston pin puller (PN 529 035 503) making sure it sits squarely against piston
A02C2CA
TYPICAL PISTON PIN EXTRACTION
A02C2AA
TYPICAL 1Properly seated all around
Install sleeve then shouldered sleeve over puller rod1 2
A02C2DA