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CHK
ADJ
SYNCHRONIZING THE THROTTLE BODIES
4. Install:
• carburetor syncronizer 1
(onto the synchronizing hose)
• digital tachometer
(near the spark plug)
5. Install:
• fuel tank
Refer to “FUEL TANK”.
6. Start the engine and let it warm up for sev-
eral minutes.
7. Measure:
• engine idling speed
Out of specification → Adjust.
Refer to “ADJUSTING THE ENGINE
IDLING SPEED”.
8. Adjust:
• throttle body synchronization
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a. With throttle body #3 as standard, adjust
throttle bodies #1, #2, and #4 using the air
screw 1.
NOTE:
@
• After each step, rev the engine two or three
times, each time for less than a second, and
check the synchronization again.
• If the air screw is removed, turn the screw 3/4
turn in and be sure to synchronize the throttle
body.
CAUTION:
Do not use the throttle valve adjusting
screws to adjust the throttle body synchro-
nization.
Carburetor synchronizer
YU-08030
Engine idling speed
1,000 ~ 1,100 r/min
Carburetor angle driver
90890-03158
Vacuum pressure at engine idling
speed
25.3 kPa
(190 mmHg, 7.48 inHg)