2002 Ski-Doo Shop Manual Volume One, Page 120Get this manual
Section 04 ENGINE Subsection 03 (443 AND 503 ENGINE TYPES)
Mount piston over connecting rod with the letters "AUS" (over an arrow on the piston dome) facing in the direction of exhaust port
All Models To minimize the effect of acceleration forces on circlip, install each circlip so the circlip break is at o'clock as illustratedUse piston circlip installer (PN 529 035 561)Insert circlip in tool at an angle