BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 277

Maximum engine RPM is 7300.
DRIVEN PULLEY
Install a 50° cam (P/N 5041363 00).
Adjust spring preload to 7.3 kg (16 lb).
DRIVE BELT
Replace original drive belt with a softer one (P/N
4146338 00).
CHAIN CASE
Replace original top sprocket (26 th) with a 25-
tooth sprocket (P/ N 5040843 00).
Keep original bottom sprocket (44 th) and drive
chain (74 links).
Engine
AIR SILENCER
Remove foam from air silencer inlet.
CAUTION : Following carburetor calibra-
tion is for grass racing at 20°C (68°F).
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MAIN JET
NEEDLE JET
JET NEEDLE
PILOT JET
AIR SCREW
THROTTLE
SLIDE
VALVE
SEAT
IGNITION TIMING
Adjust timing at 2.29 mm (.090 in).
CAUTION : The above ignition timing is
only for 1/8 mile drag. Running engine
with this timing for a longer period can result
in engine damage.
o
NOTE : This is a service tip, no warranty ap-
plies.
06-20
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PTO MAG
330
320
AA-4 AA-4
(P/ N 4041472 oo)
50 50
1.0 1.0
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1.5
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