BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 64

Section 03 CHASSIS PREPARATION
Rebound
A minimum of 0.203 mm (.008 in) clearance must be allowed between shim stack and rebound
valve stopper. Use at least one shim of 12 x .203 mm.
2. Whenever tuning for more rebound damping always use 26 mm (1.02 in) shims against piston to
properly close piston orifice holes. More thin shims will offer more control than a few thick
shims of the same overall thickness.
NOTE : When tuning for less dampening it is important to remember, never use less
o
than 3-26 mm (1.02 in) shims against piston. This will guard against fatigue breakage.
3. Piston options include 4 pistons; O, 2,4 and 6, slits for rebound dampening bleeds.
Compression
4. Whenever tuning for more compression dampening always use 30 mm (1.18 in) shims against
piston to properly close piston orifice holes. Two thin shims will offer more control than one
thick shim of the equal thickness.
NOTE : When tuning for less dampening it is important to remember, never use less than
o
3 shims against piston. This will guard against fatigue breakage.
5. Fewer spacer shims will result in more high speed dampening. A minimum of O-114 mm (.0045 in)
clearance should be allowed between shim stack and compression valve stopper. Use at least
one shim of 12 x .114.
6. Compression valve stopper must have groove facing shim stack.
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