Arctic Cat S2009BCDFCOSL, Руководство оператора

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72 PERFORMANCE TIPS
PERFORMANCE TIPS
Operating a high performance snow-
mobile requires a special attention that
is not required by a low performance
snowmobile. Often, a minor adjust-
ment will result in a large increase in
performance. This section is intended
to highlight minor conditions that
adversely affect performance and the
adjustments needed to correct them. Be
sure, however, to thoroughly read and
understand this entire manual espe-
cially the section on spark plugs, track
tension and alignment, and suspension.
DRIVE BELT — This link between the
engine and drive train is often the most
neglected component. The drive belt
must have the proper fit in the drive
clutch and driven pulley. Proper fit is
when the top surface of the drive belt is
flush with the top or up to 1/16 in.
higher than the driven pulley sheaves
(with the sheaves fully closed). If the
belt sits below this level, the snowmo-
bile will bog at slow speeds and will
have a slower maximum speed. To cor-
rect this condition, first determine if the
drive belt is within specifications (see
Drive Belt sub-section) and replace if
worn or too long. Secondly, it may be
necessary to remove a shim washer from
between the driven pulley sheaves to
allow the driven pulley to close tighter.
Adding shim washers will decrease belt
deflection and removing shim washers
will increase belt deflection. Available
shim washers from Arctic Cat are p/n
0648-714 (0.090 in.) - one included in
the tool kit, p/n 0648-715 (0.030 in.),
and p/n 0648-716 (0.060 in.).

NOTE: Removing/adding shim
washers may be done by the snow-
mobile owner if qualified to do so.
If the owner does not feel qualified,
take the snowmobile to an autho-
rized Arctic Cat Snowmobile dealer
for this service. This service is at
the discretion and expense of the
snowmobile owner.
Finally, always run the drive belt in the
same direction. Installing the drive belt
so the part number can be read will
ensure that the drive belt is always run
the same direction.
DRIVE CLUTCH AND DRIVEN
PULLEY
— Keeping the drive clutch
and driven pulley clean should be the
primary consideration of the operator.
The clutch sheaves can be cleaned of
any drive belt accumulation using a
clean cloth and parts-cleaning solvent.
All pivot points can be maintained
clean using compressed air.
CARBURETOR MAIN JETS
(Car-
bureted Models) — Proper carburetion
is absolutely necessary to obtain peak
performance. Since ambient tempera-
ture and operating altitude both affect
the main jet size needed for optimum
engine performance, the main jets
MUST be changed whenever the tem-
perature changes 20° F or whenever
operating altitude varies by more than
1000 feet. The Main Jet Chart beneath
the hood of the snowmobile identifies
the proper main jets to use under all
operating temperatures and altitudes.
Follow the Main Jet Chart carefully to
obtain peak engine performance and
avoid engine damage.
GASOLINE (EFI Models) — On the
2-stroke EFI engine models for opti-
mum performance, do not exceed the
recommended 87 octane gasoline.
Using a higher octane gasoline will not
increase overall performance; however,
the Z1 Turbo models will detect lower
octane gasoline and reduced engine
performance will result. It is recom-
mended that 91 octane (minimum) gas-
oline be used in these models.