2001 Ski-Doo Factory Shop Manual Volume One, Page 134Get this manual
Section 04 ENGINE Subsection 04 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
NOTE: When checking the combustion chamber volume, engine must be cold, piston must be free of carbon deposit and cylinder head must be leveled1Remove both spark plugs and bring one piston to Top Dead Center using TDC gauge3Open burette valve to fill its tipAdd liquid in burette until level reaches cc4Inject the burette content through the spark plug hole until liquid touches the top spark plug hole
F00D0HA
1Top of spark plug hole
F01D2IA
1Bring piston to TDC
2Obtain graduated burette (capacity 0-50 cc) and fill with an equal part (5050) of gasoline and injection oil
NOTE: The liquid level in cylinder must not drop for few seconds after fillingIf so, there is leak between piston and cylinderThe recorded volume would be false5Let burette stand upward for about 10 minutes, until liquid level is stabilized6Read the burette scale to obtain the quantity of liquid injected in the combustion chamberNOTE: When the combustion chamber is filled to top of spark plug hole, it includes an amount of 2.25 cc corresponding to the spark plug tip7Repeat the procedure for the other cylinderENGINE TYPE 377 443 503 COMBUSTION CHAMBER VOLUME (CC) (UP TO TOP THREAD OF SPARK PLUG HOLE) 20.3 0.8 24.0 1.0 27.5 1.2 29.9 1.2