1986 Ski-Doo Factory Shop Manual, Page 150Get this manual
Quality of the image is intentionally reduced!
Section 02 ENGINE SUb-section 07 (503 ENGINE TYPE)
.0711111'1 (,0028"1
.0411'111'1 tOO16')
DISASSEMBLV
21,25,26 Piston, gudgeon pincirclips
Place clean clot