1999 Ski-Doo Factory Shop Manual Volume Two, Page 130Get this manual
Subsection 04
Section 04 ENGINE (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 gauge4Inject the burette content through the spark plug hole until liquid touches the top spark plug hole
F00D0HA
TYPICAL 1Top of spark plug hole
F01D2IA
1Bring piston to TDC