Bombardier SeaDoo 1997 factory shop manual, Page 58Get this manual
Section 03 ENGINE Sub-Section 05 (TOP END)
PistonCylinder Wall Clearance
PISTON MEASUREMENT Used Piston Using micrometer, measure piston at 25 mm (1 in) from skirt end perpendicularly (90) to piston pinA
F01D8AA
1Measuring perpendicularly (90to piston pin axis 2Auxiliary transfer port A16 mm (58 in)
F01D0NA
Cylinder Out of Round
Using cylinder bore gauge, measure cylinder diameter at 16 mm (58 in) from top of cylinderMeasure diameter in piston pin axis direction then perpendicularly (90) to itIf the difference between readings exceed specification, cylinder should be rebored and honed or replaced