116 VL800K5 (’05-MODEL)
Step 3
• Turn in two idle air screws to the complete close position.
• Check for difference of vacuum between front cylinder and
rear cylinder.
• Equalize these two by gradually turning back the air screw on
the higher vacuum side until the vacuum comes down to the
lower.
NOTE:
* During balancing the throttle valves, always set the engine
rpm at 1 100 rpm, using throttle stop screw.
* After balancing the two valves, set the idle rpm to 1 100 rpm
by the throttle stop screw.
Step 4
• Check for the synchronization adjustment. If the adjustment is
not yet correct, remove each idle air screw and clean them
with a spray-type carburetor cleaner and blow dry with a com-
pressed air.
• Also, clean the idle air screw passageways.
NOTE:
* Slowly turn the idle air screw in clockwise and count the num-
ber of turns until the screw is lightly seated.
* Make a note of how many turns were made so the screw can
be reset correctly after cleaning.
* If the above procedures cannot still synchronize the valves,
proceed to the Step 3.
USE OF VACUUM BALANCER GAUGE
Calibrating each vacuum gauge
• Stop the warmed-up engine.
• Disconnect the vacuum hose
1 from the No.1 (Rear cylinder)
throttle body.
• Connect one of the vacuum balancer gauge hose to the vac-
uum nipple on the No.1 throttle body with the special tools.
" 13685-02FA0: Three way joint
13681-39F00-225: Hose
*1: To vacuum nipple.
*2: To vacuum hose.
*3: To vacuum balancer gauge hose.
*2
*3
*1
SAMPLE
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