1989 Ski-Doo Repair Manual, Page 128Get this manual
Sub-section 05
Section 02 ENGINE (503 ENGINE TYPE)
Piston notch
AOO1D11ZZ
Circlip breaj( at u'c;ock
CAUTION: ire lips must not move freely in the groove after installationIf so, replace them
18,19,20, Noise damper
For proper position of noise dampers, refer to the following illustrations
2,21, Cylinderpiston