PERFORMANCE TIPS
37
PERFORMANCE TIPS
Operating a high performance snow-
mobile requires a special attention
that is not required by a low perfor-
mance snowmobile. Often, a minor
adjustment will result in a large
increase in performance. This sec-
tion is intended to highlight minor
conditions that adversely affect per-
formance 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
- 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 snowmobile will bog at
slow speeds and will have a slower
maximum speed. To correct this
condition, first determine if the drive
belt is within specifications (see
Drive Belt sub-section) and replace
if worn or too long. Secondly, on the
driven pulley, adding shim washers
will decrease belt deflection and
r e m o v i n g s h i m w a s h e r s w i l l
increase belt deflection. Available
shim washers from Arctic Cat are
p/n 0648-714 (0.090 in.), p/n 0648-
715 (0.030 in.), and p/n 0648-716
(0.060 in.). See an authorized Arctic
Cat Snowmobile dealer for this ser-
vice.
NOTE: If the drive belt deflec-
tion is above specifications, the
snowmobile will bog and lack
power at clutch engagement. For
good performance, proper belt
deflection is critical.
Finally, always install the drive belt
so the part number can be read to
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 accumula-
tion using a clean cloth and parts-
cleaning solvent. All pivot points
can be maintained clean using com-
pressed air.
The setting of the driven pulley pre-
load will vary the peak engine RPM.
Peak engine RPM is the RPM at
which the engine develops its maxi-
mum horsepower. Optimum snow-
mobile performance will result if the
engine RPM (full throttle) is within
3% of the specifications. To increase
the peak RPM, increase the spring
tension of the driven pulley by rotat-
ing the spring adjuster clockwise. To
decrease the peak RPM, decrease
the spring tension of the driven pul-
ley by rotating the spring adjuster
counterclockwise.
NOTE: The standard clearance
from the face of the adjuster to
t h e o u t e r f a c e o f t h e t o rq u e
bracket is 6.4-9.4 mm (0.252-0.372
in.).
740-290B
NOTE: It is recommended that
the adjuster be rotated clockwise
no farther than a depth of 14.3
mm (0.5625 in.) from the face of
the adjuster to the outer face of
the torque bracket.
Spring tension is adjusted using
Spring Adjustment Tool (p/n 0644-
413).
Содержание Crossfire 700 EFI (EB) 2006
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