VL800K5 (’05-MODEL) 14-117
• Connect a tachometer.
• Start up the engine and keep it running at 1 100 rpm by turn-
ing throttle stop screw 2.
#
•
Turn the air screw 3 of the
gauge so that the vacuum acting
on the tube of that hose will bring the steel ball 4 i
n the tube
to the center line 5.
NO
TE:
The vacuum gauge is positioned vertical level.
• After making sure that the steel ball stays steady at he center
line, disconnect the hose from the No.1 throttle body vacuum
nipple and connect the next hose to this vacuum nipple.
• Turn air screw to bring the other steel ball 6 to
the center
line.
The balancer gauge is now ready for use in balancing the throt-
tle valves.
Throttle valve synchronization
Using the vacuum balancer gauge, inspect the throttle valve
synchronization in the same manner of the digital vacuum tester.
Pay attention to the following points:
The vacuum gauge is positioned vertical level, and in this posi-
tion the two balls should be within one ball dia. If the difference
is larger than one ba , turn the balance adjusting screw on the
throttle body and bring the ball to the same level.
A correctly adjusted throttle valve synchronization has the balls
in the No. 1 and No.2 at the same level.
" 09913-13121: Vacuum balancer gauge
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.
Avoid drawing dirt into the throttle body while running
the engine without intake pipe and air cleaner box. Dirt
drawn into the engine will damage the internal engine
parts.
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