2001 Ski-Doo Factory Shop Manual Volume Three, Page 100Get this manual
Section 04 ENGINE Subsection 02 (493, 593, 693 AND 793 ENGINE TYPES)
COMPONENT REMOVAL
Most engine components can be removed with engine on vehicle such as: cylinder head piston(s) cylinder(s) rewind starter oil pump water pump magneto flywheel RAVE valve(s) reed valve(s)
A32C15A
RAVE VALVE PARTIALLY REMOVED
CLEANING
Discard all gaskets and O-ringsClean all metal components in non-ferrous metal cleanerScrape off carbon formation from cylinder exhaust port cylinder head and piston dome using wooden spatulaNOTE: The letters "AUS" (over an arrow on the piston dome) must be visible after cleaningClean the piston ring groove with groove cleaner tool or with piece of broken ring