39
Adjusting Choke Cable
(External)
1. Be sure the ignition switch key is in
the OFF position and the brake lever
lock is set.
2. Slide the insulators away from the
adjusters; then loosen the jam nut
securing each choke cable adjuster.
Rotate each choke cable adjuster
clockwise until free-play is noted in
the choke lever.
3. Slowly rotate one choke cable
adjuster counterclockwise while
checking the choke lever for free-
play. As soon as all free-play has
been removed from the end of the
lever, stop rotating the adjuster.
4. With free-play removed from the lever,
slowly rotate each choke cable adjuster
once again clockwise while checking
the choke cable lever for free-play.
Adjust until 3 mm (1/8 in.) free-play
between front bottom edge of lever and
housing is attained. Securely tighten
the adjuster jam nut; then slide the
insulators onto the adjusters.
732-848B
NOTE: If a carburetor choke cable
is adjusted too tight when the engine
reaches operating temperature, the
air/fuel mixture will be incorrect and
the engine will idle poorly and may
operate only on one cylinder.
Synchronizing Throttle
Cable/Piston Valves
(External)
1. Remove the air-intake silencer boots
from the silencer to access the intake
bores.
2. Rotate the idle speed screws coun-
terclockwise until all spring tension
is removed.
3. Slide the insulators away from the
adjusters; then loosen the jam nut
securing each throttle cable adjuster.
Rotate each adjuster clockwise until
each piston valve bottoms in the pis-
ton valve bore.
4. In turn on each carburetor, place a
finger lightly against the side of the
piston valve; then rotate the carbure-
tor adjuster counterclockwise until
slight upward movement of the
valve is noted.
5. Check to make sure the valves start
to open at the exact same moment by
placing a thumb and finger against
the valves; then lightly compress the
throttle lever.
NOTE: If an individual piston valve
starts to open before another, rotate
the adjuster on the valve which is
lifting first clockwise, just enough to
synchronize the valves. Recheck by
repeating steps 2-5.
6. With the piston valves synchronized,
tighten the adjuster jam nuts
securely; then slide the insulators
onto the adjusters.
NOTE: There must be free-play in
the throttle lever.
7. In turn on each carburetor, place a
finger against the piston valve.
Rotate the idle speed screw clock-
wise until it contacts the valve.
8. Compress the throttle lever to the full-
open position; then rotate each idle
speed screw clockwise 2 complete
turns. Release the throttle lever.
NOTE: There must be 0.75-1.5 mm
(0.030-0.060 in.) free-play between the
throttle lever and the control housing.
! WARNING
Be sure to tighten the adjuster jam
nuts securely. If an adjuster jam nut is
not tightened, the adjuster can rotate
out of the carburetor cap causing the
piston valve not to return to the full-
closed position.
