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BOMBARDIER ski-doo RV 340 L/C 1977 Operator's Manual page 16

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Completely close the air screw (of each
carburetor) until a slight seating resis-
tance is felt then back off 1 turn.
Completely open (counter-clockwise)
the idle speed screw (of each carbu-
retor). Unlock cables adjuster lock nuts
then adjust the throttle cables to re-
move all slack and to synchronize the
two throttle slides when operating
throttle control lever. Lock cables ad-
justers in position by tightening the ad-
justers lock nuts.
Check condition of belt. Inspect for
cracks, fraying
or abnormal wear,
(uneven wear, wear on one side, etc.I.
If abnormal wear is noted probable
cause is pulley mislalignment. If belt is
less than 30 mm (1
0/16 ")
wide, replace.
A too narrow belt will result in a loss of
performance.
O
NOTE: When installing a new
drive belt, a break-in period of
15-25 km (10-15 miles) is strongly
recommended.
The drive pulley is of the replaceable
ramp type. Depending on the terrain
condition: driver's weight, and engine
torque, the calibration of the drive pul-
ley can be slightly compensated.
The clutch calibration kit supplied with
the vehicle permits different calibra-
tion. The standard drive pulley calibra-
tion is four (4) flyweights identified by
C3LS and two (2) ramps, identified by
2344 (12
0
-23
0
-29
0
l.
Turn idle speed screw (of each car-
buretor) clockwise until it contacts the
throttle slide then continue turning two
(2) additional turns. This will provide a
preliminary idle speed setting. Start en-
gine and allow it to warm then adjust
idle speed to 3000-3200 RPM by turn-
ing idle speed screws clockwise or
counter-clockwise.
_
CAUTION: Do not attempt to set
the idle speed by using the
air screws. Severe engine damage
can occur.
14
23
0
Replaceable ramp
29°

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