Spark Plug; Throttle Cable Adjustment; Air Filter - Arctic Cat XC 450 Operator's Manual


NOTE: Have the battery and electrical system checked
prior to operating the vehicle again.

Spark Plug

The ATV comes equipped with a
specified spark plug. See the Specifi-
cations chart for the correct spark plug
and the correct gap. A light brown
insulator indicates that the plug is cor-
rect. A white or dark insulator indi-
cates that the engine may need to be
serviced. Consult an authorized Arctic
Cat ATV dealer if the plug insulator is
not a light brown color.
To help prevent cold weather fouling, make sure to thoroughly warm up
the engine before operating. To maintain a hot, strong spark, keep the
plug free of carbon.
Before removing the spark plug, be sure to clean the area around the
spark plug. If you do not, dirt could enter engine when removing or
installing the spark plug.
Adjust to the recommended gap for proper ignition. Use a wire-type
feeler gauge to check the gap.
A new spark plug should be tightened 1/2 turn once the washer con-
tacts the cylinder head. A used spark plug should be tightened 1/8-1/4
turn once the washer contacts the cylinder head.
52

Throttle Cable Adjustment

To adjust the throttle cable free-play:
1. Loosen the jam nut from the
throttle cable adjuster.
2. Slide the rubber boot away and
turn the adjuster until the throttle
lever has the proper free-play of
3-6 mm (1/8-1/4 in.).
3. Tighten the jam nut against the
throttle cable adjuster securely;
ATV-0052
then slide the rubber boot over the adjuster.

Air Filter

The air filter inside the air filter housing must be kept clean to provide good
engine power and gas mileage. If the ATV is used under normal conditions,
service the filter at the intervals specified. If operated in dusty, wet, or
muddy conditions, inspect and service the filter more frequently. Use the
following procedure to remove the filter and inspect and/or clean it.
ATV-0047