Adjusting Carburetor - Vm-Style (Single) - Arctic Cat ZR 900 Series 2006 Operator's Manual

2. Place a drain pan beneath the
b e l l y p a n p l u g h o l e ; t h e n
remove the oil drain plug and
washer from the underside of
the crankcase.
3. Remove the oil fill cap from the
top of the engine.
4. After the oil has drained com-
pletely, install the oil drain plug
and washer and tighten to 2.3
kg-m (16.5 ft-lb).
5. Install a new belly pan plug.
6. Remove the oil filter using Oil
Filter Wrench (p/n 0644-389).
7. Apply a light coat of fresh
engine oil to the gasket of the
new oil filter.
8. Install the new oil filter by turn-
ing the oil filter by hand until
the gasket has contacted the oil
filter mounting surface; then
tighten the oil filter 3/4 turn by
hand.
9. Pour 2.9 l (3 U.S. qt) of the rec-
ommended engine oil into the
oil fill tube; then check the oil
level.
42
ADJUSTING CARBURETOR —
VM-STYLE (Single)
The carburetor has been calibrated
at the factory for average riding con-
ditions; however, altitude, tempera-
t u r e , a n d g e n e r a l w e a r m a y
necessitate certain carburetor adjust-
ments. Be sure the correct carbu-
retor main jet for the operating
temperature, altitude, and type of
gasoline is being used (see Select-
ing Carburetor Main Jet(s) sec-
tion). Since carburetor adjustments
critically affect engine perfor-
mance, Arctic Cat recommends that
all changes in internal carburetor
calibration be made by an autho-
rized Arctic Cat Snowmobile dealer;
however, four external adjustments
can be made on the carburetor.
These are the choke cable travel,
piston valve, pilot air screw, and idle
speed screw. Due to cable "stretch,"
it is recommended to check throttle
cable tension periodically and adjust
the swivel adapter as necessary.
0644-389

NOTE: Carburetor adjustments
and changing the main jet may be
done by the snowmobile owner if
qualified to do so. If the owner
does not feel qualified, take the
snowmobile to an authorized Arc-
tic Cat Snowmobile dealer for this
service. This service is at the dis-
cretion and expense of the snow-
mobile owner.
Adjusting Choke Cable
1. Be sure the ignition switch key
is in the OFF position and the
parking brake is set.
2. Loosen the jam nut securing the
choke cable adjuster. Rotate the
choke cable adjuster clockwise
until it bottoms against the
brass plunger cap.
MAINTENANCE