1997 Ski-Doo Factory Shop Manual Volume Two, Page 122Get this manual
Sub-Section 09
Section 03 ENGINE (ROTARY VALVE, COOLANT PUMP AND RESERVOIR)
Installation
To correctly install rotary valve, proceed as follows: Turning crankshaft, bring MAGneto side piston to Top Dead CenterUse dial indicator (PN 414 1047 00).414 1047 00
A00B2EA A16C16A
1Mark here 2MAG piston at TDC
After removing rotary valve shaft but before disassembling, mark brass gear in relation to shaft
A degree wheel (PN 414 3529 00) is required to measure rotary valve opening and closing angles in relation with MAGneto side pistonDegree wheel will be installed on rotary valve shaft for measurements3233
350 360 10 20 340 10 360 350 20 40