1979 Ski-Doo Supplementary Shop Manual, Page 203Get this manual
SECTION 08 SUB- SECTION 04-02
TOLERANCES AND WEAR LIMIT1979 ENGINES
ENGINE TYPE
CYlBOR IMINNOMINAL) OVERSIZE STANDARD
PISTON TO WALL CLEARANCE MAXIMUM RING END GAP MAXIMUM CRANKSHAFT END PLAY
MINIMUM -
MAXIMUM
247 248 294 343 354 402 440
69.5 mm 12.7362"1 54 .0 mm 12.159") 57.0 mm 12.2441) 59.5 mm 12.3425") 59.5 mm 123425") 64.5 mm 12.5394") 67 .5 mm 126574") 69.5 mm 127362") 67 .5 mm 12.6575") 72.0 mm 12.8346") 76.0 mm 12 .9921") 54 .5 mm 12.1456") 57.5 mm 122638") 60.0 mm 12.3622") 59.75 mm 12.3524") 65.0 mm 125590") 68 .0 mm 12 .6771") 69.75 mm 12 .746 1") 67 .75 mm 126673") 72 .25 mm 128445") 76 .5 mm 13.0 11 8")