BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 284

Section 06 COMPETITION BULLETINS AND RACING PARTS
FRONT PORTION OF SUSPENSION
141 mm idler wheel
/ /
AO06 LW5 046
Adjust original center spring to stiffer position.
Replace original stopper strap with a 50 mm (2 in)
shorter one (P/ N 4860562 00).
Shock pivot can be bolted to front holes.
TRACK
Install studs on the track as per following illustra-
tion.
0
NOTE : When installing track studs, replace
both radiator protectors with higher ones
(p/ N 4148382 00).
CAUTION : Track studs should not inter-
fere with protectors.
WARNING : Installation of track studs is
not a safe practice recommended by Bom-
bardier, and we strongly suggest not to alter
the track configuration or design. The actual
installation of studs involves many factors, in-
cluding rider weight, suspension set-up, ter-
rain type and conditions as well as driver's
experience and preference. One must also con-
sider the adequacy of stud retention, short and
long term, accidental body or vehicle contact
and under certain conditions, greater stopping
distances. One should also consider greater
strain on the drive components and reduction
in track strength to name a few.
A024 005032
FRONT SUSPENSION
Collapse front suspension until lower and upper
arms are horizontal. Tie suspension to limit travel
(reduced to 75 mm (3 in) in that position using
straps on shock bolts).
Replace carbide runner with standard runner (P/ N
5050638 00).
DRIVE SYSTEM
DRIVE PULLEY
Replace original spring with a Violet (P/N 417
2057 20) 254 lb (Comet P / N 207758A).
Engagement speed should beat 4500 RPM.
Maximum engine RPM is 8400.
DRIVEN PULLEY
Install a 54° cam (P/N 4860563 00).
Adjust spring preload to 6.4 kg (14 lb).
CHAIN CASE
Replace original top and bottom sprockets along
with drive chain with the following :
24-tooth sprocket (P/ N 5041397 00).
44-tooth sprocket (P/ N 5040855 00).
Drive chain (74 links) (P/ N 4121069 00).
DRIVE BELT
Use drive belt (P/ N 4147948 00).
06-27