1999 Ski-Doo Factory Shop Manual Volume Two, Page 132Get this manual
Subsection 04
Section 04 ENGINE (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
Read the measurement on the cylinder bore gaugeThe result is the exact pistoncylinder wall clearanceIf clearance exceeds specified tolerance, replace cylinder or reboreRefer to TECHNICAL DATA 10NOTE: Make sure the cylinder bore gauge indicator is set exactly at the same position as with the micrometer, otherwise the reading will be false
RINGPISTON GROOVE CLEARANCE
F00B09A
1Use the micrometer to set the cylinder bore gauge 2Dial bore gauge
Using feeler gauge check clearance between rectangular ring and grooveReplace piston if clearance exceeds specified toleranceRefer to TECHNICAL DATA 10-02