1986 Ski-Doo Factory Shop Manual, Page 214Get this manual
Section 02 ENGINE
Sub-section 10 (ENGINE DIMENSIONS MEASUREMENT)
Total shim thickness needed for the end-play adjustmenn! is determined with the following procedure: aJ Measure crankcase halves as illustrated (M, and M2)dl Measure the distance ring and adjustment shims thickness (M7 and MalAdd these measurements to obtain dimension "8"e) From dimension
A standard compressed crankcase gasket will have 0.30 mm (.012") thickness (M3)' Add these measurements to obtain dimension "A"
A, subtract dimension Bthat must be
The result is the actual crankshaft within specification
If the result is over specification, add adjustment shim(s) to reach this specificationMeasuring Ml and M2