Bombardier SeaDoo 1992 factory shop manual, Page 57Get this manual
Section 03 ENGINE Sub-section 03 (TOP END)
Or, to accurately determine piston to cylinder wall clearanceMeasure piston 25 rnm (1 in1 below skirt end perpenchcularly) to piston pinMeasure cylinder 16 mrn (518 in) below its top edge
NOTERing piston groove clearaince can be correctly measured only on rectangular ring which is bottom ring
Rectangular ring
Ring End Gap
Position ring just above transfer ports, relation with top of cylinderMeasuring perpendicularly
(90') to piston pin axis
F001 003 023
NOTEIn order to correctly position rung in cylinder, use piston as pusher