BOMBARDIER Ski-doo MX ZX 440 Operator's Manual page 7

37) Timing Switch
Except European Model
NOTE: This switch is disabled (not operative) on vehicles modified for
warranty validation.
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2
A33E0GA
1. 91 Octane
2. 100 + Octane
Select octane level according to fuel octane number used.
CAUTION: Never use timing switch at position 100+ with 91 fuel
octane. Refer to MAIN JET - TIMING - FUEL CHART decal on belt
guard.
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