2003 Polaris Deep Snow Snowmobiles Service Manual, Page 89Get this manual
ENGINES Assembly, Cont16Lubricate main bearing oil holes with Polaris Premium Cycle or Premium Gold engine oil and rotate crankshaft to distribute oil evenly17Install new C-clip in both pistons (inside) with gap facing up or downBe sure clip is fully seated in the piston groove18Lubricate and install new connecting rod small end bearing in rod19Install piston with the ring locating pins facing the intakeWarming the piston may help to ease installation of pin20Install remaining C-clip with gap downBe sure both clips are fully seated in the grooveGap Down
C-Clip Installation Tool PN 287240120mm for Small Block (500-600 Domestic Engines)