1985 Ski-Doo snowmobile Service Manual, Page 40Get this manual

1985 Ski-Doo snowmobile Service Manual, Page 40

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Section 02 ENGINE Sub-section 02 (253 ENGINE TYPE)

NA 10 mm (0039") 20 mm (0079") 20 mm 10079") 1.0 mm 10394"}

Engine mounting support

Ringpiston groove clearanc