1980 Ski-Doo Shop Manual, Page 56Get this manual
SECTION 03 SUB-SECTION 02 (ENGINES)
TOP lEND CLEANING
Discard all gasketsClean all metal components in non-ferrous metal cleanerScrape off carbon formation from cylindre exhaust portcylinder head and piston dome using wooden spatula
Cylinder to wall clearance should be:
MINIMUMMAXIMUM 0.0600,200 mm (.0024)(,008")
Position cylinder head on
NOTE: The letters "AUS" (over an arrow on the piston dome) must be visible after cleaning
cylinder with nuts and push cylinder towards magneto while cross torquing nuts to 21 Nom (15 ft-Ibs)
Clean the piston ring grooves with groove cleaner tool, or with piece of broken ring
DISASSEMBLYASSEMBLY
o Place clean cloth over crankcase to prevent
circlips from falling into crankcaseUse pointed tool to remove circlips from pistonCAUTION: When tapping out gudgeon pins, hold piston firmly in place to eliminate the possibilities of transmitting shock and pressure to the connecting rod, At assembly, place the piston over the connecting rod with the letters" AUS" (over an arrow on the piston dome) facing in direction of the exhaust portPush cylinder towards magneto