1989 Ski-Doo Repair Manual, Page 43Get this manual
Section 02 ENGINE Sub-section 01 (247 ENGINE TYPE)
EXHAUST
AOOl 002001
To center the piston pin with the connecting rod bearing, use centering tool (P529 0091 00)ADO' 001 046
NOTE: 0.5 mm oversize piston and rings are available if necessaryCentering tool
INSPECTION
The inspection of the engine top end must include the following measurements:
TOLERANCES MEASUREMENTS FITTING NEW PARTS (MAX (MIN WEAR LIMIT
N 529 0091 00)
Cylinder taper Cylinder out of round Cylinderpiston clearance Ringpiston groove clearance Ring end gap