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CHK
ADJ
SYNCHRONIZING THE THROTTLE BODIES
4. Install:
• vacuum gauge attachments
(into the bolt holes)
• vacuum gauge
(onto the vacuum gauge attachments)
• engine tachometer
(onto the ignition coil of cylinder #1)
NOTE:
Disconnect the ignition coil coupler and
remove the ignition coil 1 of cylinder
#1, remove the rubber cover 2, and
wrap the engine tachometer lead sev-
eral times around section a of the igni-
tion coil. Then, install the ignition coil
and connect the ignition coil coupler.
5. Install:
• fuel tank
Refer to “FUEL TANK AND AIR FIL-
TER”.
6. Start the engine and let it warm up for
several minutes.
Vacuum gauge
90890-03094
Vacuum gauge attachment
90890-03060
Engine tachometer
90890-06760
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7. Measure:
• engine idling speed
Out of specification → Adjust.
Refer to “ADJUSTING THE ENGINE
IDLING SPEED”.
Engine idling speed
1,000 ~ 1,200 r/min
8. Adjust:
• throttle body synchronization
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
a. Turn the air screws 1 to adjust the
vacuum pressure of all throttle bodies
to specification.
NOTE:
Do not turn the synchronizing screws.
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