2004 Skidoo ZX Series Service Manual, Page 285Get this manual

2004 Skidoo ZX Series Service Manual, Page 285

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Section 05 ENGINES (4-TEC) Subsection 07 (CRANKSHAFTDRIVE GEARS)
PistonCylinder Clearance Adjust and lock micrometer to the piston dimension
R1004motr25A

1 Piston 2 Piston pin