1997 Ski-Doo Factory Shop Manual Volume One, Page 60Get this manual
Section 03 ENGINE Sub-Section 02 (277 ENGINE TYPE)
Remove piston from connecting rodInstall locating sleeveThen push needle bearings along with thrust washers using 21 mm (.826 in) diameter pusher Grease thrust washers and install them on each end of needles Using 21 mm (.826 in) diameter pusher, insert needles into connecting rod
A21C04A
1Pusher 21mm (.826 in)
NOTE0.25 and 0.5 mm oversize pistons and rings are available if necessaryUse locking tie to fasten all needles and thrust washers along with sleeves
A21C02A
Mount piston over connecting rod with the letters "AUS" (over an arrow on the piston dome) facing in the direction of exhaust port