1989 Ski-Doo Repair Manual, Page 211Get this manual
Section 02 ENGINE SUb-section 09 (ENGINE DtMENSION MEASUREMENT)
"To acclrately determine piston to wall clearance,
Measurement
the piston should 00 measured right under the axis hole and the cylinder should be measured 16 mm 58 in) below its top edge
NOTE: Ring Jpiston groove clearance' can be measured only on rectangular ringOn all engines except 247, only the bottom ring is rectangular
A0010020a
RING END GAP
NEW RING MINtMUM- MAXIMUM
All engines
0.200.35 mm
C008.014 inl