BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 140

Section 04 ENGINE PREPARATION
, F01D2JS
1. Find 132° on degree wheel and mark here
2. Opening mark
3. Bottom of MAGneto inlet port
4. Align 360° line ofdegreewheel here
— For closing mark, first align 360° line of degree wheel with TOP of MAGneto side inlet port.
Then find 52° line degree wheel and mark crankcase at this point.
, F01D2KS
1. Top of MAGneto inlet port
2. Align 360° line ofdegreewheel here
3. Closing mark
4. Find 52°0n degree wheel and mark here
Bring MAGneto side piston to top Dead Center using a TDC gauge.
—
— Rotate rotary valve gear clockwise to remove any backlash.
— Position the rotary valve on gear to have edges as close as possible to the marks.
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