Arctic Cat 400 Service Manual page 374

8. Check for proper carburetor synchronization by
attaching suitable vacuum gauges to the test
ports; then start the engine and increase the
RPM above idle. The gauges should read within
2 cm/Hg (0.78 in./Hg) of each other. Turn the
synchronization screw to equalize vacuum.
NOTE: Idle RPM must be reset any time the syn-
chronization screw is adjusted.
REMOVING
1. Turn the ignition switch to the OFF position;
then remove the ignition switch key.
! WARNING
Do not turn the ignition switch to the ON position
with the hoses removed. Gasoline will be
pumped by the electric fuel pump causing a
safety hazard.
2. Remove the seat; then drain the coolant.
3. Remove the storage compartment cover and air
filter housing cover; then remove the air filter.
4. Disconnect the gas hoses from the carburetors.
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KX025E
KX025C
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5. Remove the screws securing the lower air filter
housing to the carburetors; then remove the
lower housing and tape over the carburetor
inlets.
! CAUTION
Severe engine damage will occur if hardware
items or other foreign objects are ingested by the
engine on start-up.
6. Remove the screw securing the throttle actuator
cover to the front carburetor; then remove the
cover.
7. Remove the throttle cable from the actuator arm.
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KX118
4
CKX119
KX136
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