Chain Case; Drive Belt; Ignition Timing; Carburetion - BOMBARDIER 1996 Ski-doo MX Z440 Handbook

Section

CHAIN CASE

Replace original top sprocket (25 th) and chain
with the following :
23-tooth narrow sprocket (P/ N 5040784 00)
72-link chain (P/ N 4121055 00)

DRIVE BELT

Use drive belt P / N414 828700.
CAUTION : Following ignition timing and
carburetor calibration are for grass rac-
ing at 20"C (68°F).
ENGINE

IGNITION TIMING

2.16 mm (.085 in) before to dead center.
AIR SILENCER
Remove foam from air silencer inlet.
Formula STX (38 mm Carburetors)
I I
MAIN JET 280
JET NEEDLE
I
480 P-6
NEEDLE JET
I I
40
PILOT JET
AIR SCREW
2.5
THROTTLE
CUT-AWAY
SLIDE
1.5
VALVE SEAT
I
COMPETITION BULLETINS AND RACING PARTS
06
Formula Z (40 mm Carburetors)
I
JET NEEDLE
NEEDLE JET
PILOT JET
AIR SCREW
SLIDE
I
VALVE SEAT
o
I I
290
I I
480 P-6
I I
40
1.0 1.0
2.5
CUT-AWAY
I
1.5
I
300
M - o
(p f N 4041335 00)
50
3/4
1.5
NOTE : This is a service tip, no warranty
applies.
I
I
300
I I
I
AA-o
(p/ N 4041335 ()())
50
3/4
2.5
CUT-AWAY
1.5
I
I
06-17