1999 Ski-Doo Factory Shop Manual Volume One, Page 130Get this manual
Section 04 ENGINE Subsection 04 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
RECTIFYING SURFACES
Stick fine sand paper sheet on the surface plate then lightly oil the sand paperRub manifold mating surface on sand paper using 8-figure movementsSand until mating surface is perfectly straight
CHECKING CRANKSHAFT ALIGNMENT
Install degree wheel (PN 295 000 007) on crankshaft endRemove both spark plugsInstall TDC gauge (PN 414 104 700) in spark plug hole on MAG sideBring MAG piston at top dead centerRotate degree wheel (not crankshaft) so that 360 mark aligns with center of crankcaseScribe mark on crankcaseRemove TDC gauge and install it on PTO sideBring PTO piston to top dead center10 20 30 40 50 60 70