2004 Skidoo ZX Series Service Manual, Page 255Get this manual
Section 05 ENGINES (4-TEC) Subsection 05 (LUBRICATION SYSTEM)
Check sieves for cracks or other damageNOTE: Replace sieves if damaged
Inspection
Check reed valve for cracks or other damageNOTE: Replace reed valve if damaged
Installation
NOTE: During assembly always replace both O-rings no40 and no41CAUTION: Take particular care with oil sieve no42 to ensure that it is re-installed in exactly the same position
Installation
NOTE: Before assembly slightly grease the rubber gasket of the reed valve with multi-purpose grease
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1Correct installation position of oil sieve