Bombardier SeaDoo 1992 factory shop manual, Page 56Get this manual
Section 03 ENGINE Sub-section 03 (TOP ENDS
NOTEReplacement cylinder sleeves are available if necessaryConsult specialized shop for installationNOTE0.25 and 0.5 mrn oversize piston and rings are available if necessary
Cylinder Taper
Using cylinder bore gauge, mealsure cylinder diameter 16 mrn (58 in) from top of cylinder to just below auxiliary transfer port, facing exhaust portIf the difference between readings exceed specification, cylinder shlould be rebored and honed or replaced
Cyllinder Piston Clearance
(90') to piston
Clearance can be quickly checked with long feeler gaugeInsert feeler gauge in cylinder then slide piston (without piston rings installed! into cylinder as shown in the following illustration