2005 Ski-Doo RT Series Shop Manual, Page 78Get this manual
Section 02 ENGINE Subsection 07 (TOP END)
A32B0EA
CIRCLIP READY TO BE INSTALLED ON PISTON
Using plastic hammer, tap pusher to put circlip in placeMake sure to install new circlips with tab toward top as per following photo
A35C11A
Ensure to properly align mounting holesChoose the right gasket thickness according to combustion chamber volumeRefer to ENGINE MEASUREMENTInstall selected gasket on crankcaseCAUTION: Always install gasket of the proper thicknessFailure to do so may lead engine to poor performanceBefore inserting piston in cylinder, lubricate the cylinder with new injection oil or equivalentTo ease cylinder block installation, it is recommended to use piston ring compressor pliers such as Snap-ON RC-980 or equivalentBring one piston close to TDC then carefully slide piston into cylinder