1982 Ski-Doo Shop Manual, Page 144Get this manual
SECTION 02 ENGINE SUB-SECTION 08 (ENGINE TOLERANCES MEASUREMENT)
Using feeler gauge, check ring end gapIf gap exceeds specified tolerance the ring should be replaced
The difference between these two measurements should be within specified tolerance
RING PISTON GROOVE CLEARANCE
MINIMUM MAXIMUM (wear limit)
CRANKSHAFT DEFLEXION
TYPE MAXIMUM
0.04 mm (,002")
- 0.20 mm(,008")
247,277 377,454,464 503,640
1.0 mm (0.039") 0.08 mm (0.031 ")