1997 Ski-Doo Factory Shop Manual Volume Three, Page 75Get this manual
Sub-Section 03
Section 03 ENGINE (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
A01C3HA
ENGINE TYPE All
NEW PARTS MIN MAX0.03 0.012 mm (.0001 .0005 in)
WEAR LIMIT 0.015 mm (.0006 in)