2004 Skidoo ZX Series Service Manual, Page 140Get this manual
Section 04 ENGINES (2-STROKE) Subsection 02 (593, 593 HO SDI, 693 AND 793 SDI ENGINE TYPES)
CAUTION: Always install new mono-hook circlipsIf circlip installation fails at the first attempt, always retry with new one because, on second attempt, the circlip will lose its normal retaining capabilitiesCAUTION: Circlips must not move freely after installation; if so, replace themClean cylinders and crankcase mating surfaces with Loctite Chisel (PN 413 708 500)Coat crankcase mating surface with Loctite 518 (PN 293 800 038)Choose the right gasket thickness according to combustion chamber volumeRefer to LEAK TEST AND ENGINE DIMENSION MEASUREMENTInstall it on crankcaseCoat gasket with Loctite 518CAUTION: Always install gasket of the proper thicknessFailure to do so may cause detonation and severe engine damageBefore inserting piston in cylinder, lubricate the cylinder with new injection oil or equivalentInstall cylindersDo not tightenInstall new rubber ring and round O-rings on each cylinder