1983 Ski-Doo Shop Manual, Page 62Get this manual
SECTION 02 ENGINE SUB-SECTION 04 (464 ENGINE TYPE)
CLEANING
Discard all gasketsClean all metal components in non-ferrous metal cleanerScrape off carbon formation from cylinder exhaust port, cylinder head and piston dome using wooden spatula
ASSEMBLY
At assembly, place the pistons over the connecting rods with the letters AUS (over an arrow on the piston dome) facing the direction of the exhaust port
NOTE: The letters" AUS" (over an arrow on the piston dome) must be visible after cleaningEXHAUST
Clean the piston ring grooves with groove cleaner tool, or with piece of broken ring
DISASSEMBL Y
Place clean cloth over crankcase to prevent circlips from falling into crankcase then use pointed tool to remove circlips from piston Drive the gudgeon pins in or out using suitable drive punch and hammer_ CAUTION: When tapping gudgeon pin in or outof piston, hold piston firmly in place to eliminate the possibilities of transmitting shock and pressure to the connecting rodTo minimize the effect of acceleration forces on circlip, install each circlip so the circlip break is at o'clock as illustratedUsing very fine emery cloth, remove any burrs on piston caused through circlip installation