1986 Ski-Doo Factory Shop Manual, Page 215Get this manual
Section 02 ENGINE Sub-section 10 (ENGINE D1MENSIONS MEASUREMENT)
253 engine type
ENGINE TYPE MINIMUM
0.1 mm 1.004")
Bearing simUlator
PIN 420 676 155
MAXIMUM
0.4 mm 1.016")
Adjustment
Refer to Illustrations related to the text
Gentlv lap ontO
the bearina simulator