2004 Skidoo ZX Series Service Manual, Page 157Get this manual

2004 Skidoo ZX Series Service Manual, Page 157

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Section 04 ENGINES (2-STROKE) Subsection 03 (ENGINE LEAK TEST AND MEASUREMENT)
F00B0AA F00B08A

1 Indicator set to (zero)

1 Micrometer set to the piston dimension