BRP ski-doo MACH Z 1000 SDI, Handbook

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03-32
MMC2005-001_03A.FM
SECTION 03 - CHASSIS PREPARATION
When installing carbide inserts, start with 100 mm
(4 in) of carbide in front of a line projected from the
center line of the ski leg and 125 mm (5 in) behind
the line. Always keep the amount of carbide be-
hind the line longer than in front.
A. 122 mm (5 in) 98 mm (4 in)
147 mm (6 in) 171 mm (7 in)
The condition of the skis and runners, as well as
their alignment, has an effect on top speed. The
ski toe-out must be correct; any irregularities in the
skis should be removed, and bent or badly worn
runners must be replaced.
CAUTION: The amount of carbide allowed on
each runner may be limited by your race asso-
ciation. Check your rule book.
BUMP STEER
Bump steer refers to the amount of change in the
toe-out of the skis as the suspension moves
through its total vertical travel. Block up the ma-
chine so that the skis are just off the ground and
remove the springs from the shocks. This will al-
low you to cycle the suspension and measure the
bump steer on your vehicle.
You will need a reference point to measure to as
you cycle the suspension through its travel. Be-
cause you will be lifting the ski and suspension
assemblies as you are measuring, you should use
a reference point that is not easily bumped out of
position. A pair of concrete blocks set on a line
about 50 mm (2 inches) away from the edge of the
ski and parallel to the ski works nicely.
Lift the ski up to its upper travel limit. Using a mea-
suring tape, measure the distances from the front
and rear edges of the ski to the concrete block ref-
erence. The front and rear measurements must be
equal or no more than 1.6 mm (1/16 in) difference
if the bump steer adjustment is correct.
SKI LEG CAMBER
The camber angle of the ski legs changes how ag-
gressively the ski runners hook up with the driving
surface. Adding negative camber will have the
most effect on handling. This is because the
weight shift in a turn is always to the outside of
the turn and the negative camber of the ski leg
causes the wear bar to be presented to the driving
surface in a more aggressive position. Positive
camber will tuck the wear bar in toward the sled,
thereby reducing its traction in a turn.
Camber adjustments do have an effect on the
width of the machine. Make certain your camber
adjustments do not push you beyond the overall
width limit imposed in most forms of racing.
Camber is the tilting of the ski leg from the vertical.
To obtain a negative camber angle, the ski leg
must be tilted inward so that the ski legs are closer
together at the top than at the bottom. Positive
camber would tilt the top of the ski leg away from
the machine. Camber angle is measured in de-
grees from the vertical and must be noted as pos-
itive or negative.
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