1978 Ski-Doo Shop Manual, Page 352Get this manual
SECTION 08 SUB-SECTION 04-02
TOLERANCES AND WEAR LIMITENGINES
CYLBORE (MINNOMINAL) YEAR ENGINE TYPE STANDARD OVERSIZE PISTON TO WALL CLEARANCE FinED TOLERANCE WEAR LIMIT MAXIMUM RING END GAP MAXIMUM CRANKSHAFT END PLAY
1978 1978 1978 1978 1978 1978 1978 1978 1978 1978 1978 1978
247 248 294 305 343 345 346 354 402 440
69.0 mm (2.7165") 54.0 mm (2.159") 57.0 mm (2.2441") 55.5 mm (2.1850") 59.5 mm (2.3425") 63.0 mm (2.4803") 59.5 mm (2.3425") 59.5 mm (2.3425") 64.5 mm (2.5394") 67.5 mm (2.6574") 69.5 mm (2.7362") 76.0 mm (2.9921")
69.5 mm (2.7362") 54.5 mm (2.1456") 57.5 mm (2.2638") 56.0 mm (2.2047") 60.0 mm (2.3622") 63.25 mm (2.4901") 59.75 mm (2.3524") 59.75 mm (2.3524") 65.0 mm (2.5590") 68.0 mm (2.6771") 69.75 mm (2.7461") 76.5 mm (3.0118")
0.063-0.099 mm 1.0025-.0039") 0.048-0.083 mm 1.0019-.0033") 0.050-0.085 mm I.0020-.0033"0.068-0.104 mm 1.0027-.0041 ") 0.078-0.114 mm 1.0031-.0045") 0.048-0.083 mm 1.0019-.0033") 0.099-0.134 mm 1.0039-.0053") 0.080-0.115 mm 1.0032-.0045") 0.068-0.104 mm 1.0027-.0041 ") 0.070-0.105 mm 1.0028-.0041") 0.070-0.105 mm 1.0028-.0041") 0.068-0.104 mm 1.0027-.0041")