2003 Ski-Doo ZX Series Factory Shop Manual, Page 158Get this manual
Section 04 ENGINE Subsection 06 (OIL INJECTION SYSTEM)
A10C01A
420 876 695
A32C57A
TYPICAL
ASSEMBLY
1, Spring Clip
Always check for spring clips tightness
APPLY LOCTITE ON THIS AREA ONLY
Install the check valve in the correct position as described on next photos into the crankcase lower side
6, Oil Pump Gear