1984 Ski-Doo Shop Manual, Page 120Get this manual
SECTION 02 ENGINE SUB-SECTION 06 (503 ENGINE TYPE)
NOTE: Spare parts pistons and cylinders are identified with green or red dot, it is important to match the piston with the cylinder of the same colorTo minimize the effect of acceleration forces on circiip, install each circlip so the circlip break is at o'clock as illustrated
Remove any burrs from piston caused through circlip installation using very fine emery cloth
Or use exhaust manifold to align cylinders Piston notch +i::I"'k'1
27, Intake manifolds (Blizzard 5500 MX)
Install intake manifold as per the following illustration (Bli zzard 5500 MX model)Circlip break This portion towards top of cylinder