2004 Ski-Doo Elite Factory Service Manual, Page 174Get this manual
Section 04 ENGINE Subsection 09 (ENGINE BLOCK)
NOTE: Use ring expander to prevent breakage during installationThe oil ring must be installed by handCheck that rings rotate smoothly after installationSpace the piston ring end gaps 120 apart and do not align the gaps with the piston pin bore or the thrust side axisA A