Performance Tips - Arctic Cat ZR 6000 R SNOCROSS 2015 Operator's Manual

Performance Tips

Operating a high performance snowmobile requires a
special attention. Often, a minor adjustment will result in
a large increase in performance. This section 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 especially 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 clutch. 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 clutch sheaves (with the sheaves
fully closed). If the belt sits below this level, the snow-
mobile will bog at slow speeds and will have a slower
maximum speed. To correct this condition, first deter-
mine if the drive belt is within specifications (see
Drive Belt section) and replace if worn or too long.
Secondly, always run the drive belt in the same direc-
tion. 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 CLUTCH —
Keeping the drive clutch and driven clutch 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.
CAUTION
Use Clutch Puller (p/n 0744-062). Never substitute a
different puller or drive clutch damage will occur.
CARBURETOR MAIN JETS — Proper carburetion,
specifically proper main jets, is absolutely necessary to
obtain peak performance. Since ambient temperature
and operating altitude both affect the main jet size
needed for optimum engine performance, the main jets
will often need to be changed whenever the tempera-
ture changes 20° F (11° C) or whenever operating alti-
tude varies by more than 1000 feet.
107