11-2
MMC2005-001_11A.FM
SECTION 11 - COMPETITION PREPARATION
These are general guide lines for preparing a stock
REV chassis for various forms of competition. Re-
fer to the appropriate section of the book for more
detailed information and tuning components.
SNO CROSS
Chassis
• The ideal chassis to use is the MX Zx 440 REV
chassis. This chassis is specifically designed for
Sno Cross racing.
Front Suspension
• The 2004 MX Zx 440 REV comes equipped with
remote adjustable shocks for both high and low
speed compression. Use the low speed shock
adjusters to control the small or slow bumps
and adjust the high speed adjusters to control
big or fast bumps to prevent the suspension
from bottoming out.
• Stock spring rate is 18.4 N/mm (105 lbf/in, and
there is lighter and stiffer springs available. Adjust
spring preload between 0 and 13 mm (0 in and
1/2 in) of suspension ride in (sag) when the rider
is standing in race position. If you have to adjust
the spring pressure more than 38 mm (1-1/2 in)
of preload on the shock, you may want to
change to a stiffer spring.
• A 13 mm (1/2 in) diameter anti roll bar comes
standard. Many racers choose to remove the
anti-roll bar. If you remove the bar, make sure to
cover the holes in the bulkhead area with alumi-
num or plastic plate as to prevent snow from
entering. If you wish to use a larger bar, the 600
& 800 REV use a 16 mm (5/8 in) diameter. Those
are the only options available to date.
Center Suspension
• Set spring pressure to light settings and adjust
shocks adjusters to control high and low com-
pression to prevent bottoming out. If the rear of
the sled wants to pass the front while in the air,
reduce spring pressure and/or shock compres-
sion.
Rear Suspension
• Again, the rear shock has external adjusters for
high and low speed compression. Set adjusters
so the suspension does not bottom out. This
adjustment must be for different courses.
• Adjust spring pressure, with the rider in place,
so the ACM block is in the center of the cou-
pling window. Stiffer and softer springs are
available. Adjust the ACM block to control the
amount of weight transfer according to condi-
tions.
Fuel and Carburetion
• Recommended fuel octane is minimum 100. Be
aware that only unleaded fuel is legal to use.
Use the jetting chart on the belt guard as a guide-
line. When installing 0.3 mm (.012 in) base gas-
ket, you are able to increase octane and perfor-
mance. Higher altitude requires lower fuel
octane. Example, 1829 m (6000 feet), maximum
100 octane.
Skis
• The ski loops do not meet ISR guidelines, there-
fore modification to the loops must be made
before using them in competition. The loop
must be rapped and secured with a foam or rub-
ber tube to meet the 25 mm (1 in) minimum
width and also fold over the front of the ski tip
and secured. Failure to do so may result in dis-
qualification.
Snow Flap
• Some circuits are requiring that the snow flap
be long enough to touch the ground when the
rider is not on the sled. An extension may be
required. Best extension material is plastic
sheet or another snow flap.
HILLCROSS
Special Rules
• The stud rule is the same as Sno Cross. Care
must be taken when installing studs as not to
place them where they will cause damage to
heat exchanger or tunnel. Tunnel protectors of
the correct height are required.
• Most circuits have different classes from Stock
to Modified, be sure to check with the Race Cir-
cuit for specific rules and guidelines regarding
each class.
Suspension
• Use Sno Cross spring and shock set up.
Содержание ski-doo MACH Z 1000 SDI
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Страница 289: ...SECTION 06 DRIVE SYSTEM MMC2005 001_06A FM 06 27 422 A01D3JA 417 222 562 427 A01D3KA 417 222 677...
Страница 473: ...SECTION 12 SERVICE TOOLS MMC2005 001_12A FM 12 29 N Scratch remover P N 861 774 800 APPLICATION All models...
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