1985 Ski-Doo snowmobile Service Manual, Page 77Get this manual
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Section 02 ENGINE Sub-section 04 (447 ENGINE TYPE)
.08 mm 10031") .05 mm (0020") .20 mm 10079") 20 mm 10079") 1.0 mm (0394")
NOTE: The letters "AUS" (over an arrow on the piston dom