BRP ski-doo MACH Z 1000 SDI, Handbook

Page: 48 / 493

03-18
MMC2005-001_03A.FM
SECTION 03 - CHASSIS PREPARATION
Shim Comparator Formula
Thickness³ or cubed.
Example: .152 x .152 x .152
Another method of changing dampening is by con-
trolling the amount of space the stack has to open.
This is done by reducing the amount of smaller
shims which support the larger shims. The larger
shims act the same until they bottom out against
the valve stopper.
The large shims are only able to deflect .203 mm
instead of .610 mm thus reducing the flow area of
the piston. This will result in the same low speed
dampening, but the medium and high speed
damping will be increased. The following graph
represents the effect of changing the total thick-
ness of small shims which determine the amount
of large shim deflection.
A01F27A
COMPRESSION
PISTON SPEED
0
0
12 mm
diameter
15 mm
diameter
16 mm
diameter
REBOUND
Dampening
force
0
0
12 mm
diameter
15 mm
diameter
16 mm
diameter
PISTON SPEED
Dampening
force
STIFFER
VALVE STOPPER
Qty. Dia. (mm) Tickness
3 x 30 x .203
1 x 18 x .203
VALVE STOPPER
Qty. Dia. (mm) Tickness
3 x 30 x .203
1 x 18 x .203
1 x 18 x .203
1 x 16 x .203
1 x 15 x .203
SOFTER
A99F06A
0
0
Piston speed
Dampening
force
Large shims
do not touch
valve stopper
.342 mm
.228 mm
.114 mm
A01F1YA