1986 Ski-Doo Factory Shop Manual, Page 66Get this manual
Section 02 ENGINE Sub-section 03 (377 ENGINE TYPE)
1 HexnUl M8 IS} 2Distance nut MB 27,5 (31
3Washer (8) 4Cylinder head (2) 5Gasket, cylinder head (21 6, Noise damper 7, Cylinder (2 8Gasket, intake manifold (41 eImake manifold 11 rDLock washer mm 12} 11Hexscrew M8 40 (2) 12Lock' washer mm (21
13Hexscrew M8 74 (2) 74Hex screw M6 25(2) 15Lock washer mm (2) 16Intake cover11 17Rubber ring (1 18Gasket, cylinder flange 121 19Semi-trapez ring 12J 20Rectangular ring (2) 21Piston (2} 22Gudgeon pin (21 23Circlip 141 24 Needle cage (2J
CLEANING
Discard all gasketsClean all metal components in non-ferrous metal cleanerScrape off carbon formation from cylinder exhaust port, cylinder head and piston dome using wooden spatulaMEASUREMENTS
Cylinder taper Cylinder out of round Cylinderpiston clearance RingPiston groove clearance Ring end gap
TOLERANCES FITTING NEW PARTS (MIN (MAX NA NA
08 mm L0031"1 ,04 mm 10016") .20 mm (.0079")
WEAR LIMIT O'USURE
,08 mm (0031"1 .05 mm (0020") .20mm (,0079") 20 mm 1.0079") 1.0 mm