BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 102

Section 03 CHASSIS PREPARATION
4. Again, measure from the floor to the bottom of the rear grab handle. This dimension
should be 1" to 2" (25 mm to 50 mm) less than the fully extended dimension.
A) If the vehicle settles more than 2" (50 mm), increase the rear spring preload.
5.
B) If the vehicle settles less than 1" (25 mm), decrease the rear spring preload.
This is a preliminary setting only ! Increase and decrease the preload adjustments to
6.
fine tune for your preference.
7. The center spring and ski springs will have the most affect on handling, but if the
B. General tips.
If the spring and preload combination you are using exerts the right amount of pressure at
full compression but has too much force at initial compression, try a shorter, stiffer spring.
The shorter spring will not be preloaded as much and will "act" softer during initial
compression, but will get stiffer as the suspension compresses. Conversely, if a setup is
good at initial compression but too stiff at full compression, then a softer spring would be
used. The following chart can be used to determine how much force a spring and preload
combination will exert during compression.
L,
SPRING
SPRING
FREE
INSTALLED
LENGTH
LENGTH
10" 7 "
7"
7"
8"
7"
7"
7"
7"
7"
8"
7"
03-86
FORCE (LB)
K
SPRING
RATE INSTALLED
(LB / IN) LENGTH
100 300
200 0
200 200
100 0
150 0
150 150
AT VARIOUS COMPRESSION LENGTH
1/2" 1 .5"
350 400 450
100 200 300
300 400 500
50 100 150
75 150 225
225 300 375
2.0 " 2.5"
c % .
500 550 500
400 500 600
600 700 800
200 250 300
300 375 450
450 525 600