Yamaha FZ6-ST Supplementary Service Manual - Chk
3-18
SYNCHRONIZING THE THROTTLE BODIES
CHK
ADJ
NOTE:
CAUTION:
NOTE:
6. Measure:
Sengine idling speed
Out of specification
! Adjust.
Refer to “ADJUSTING THE ENGINE IDLING
SPEED”.
Engine idling speed
1,250
X 1,350 r/min
7. Adjust:
Sthrottle body synchronization
a. With throttle body #1 as standard, adjust
throttle bodies #2, #3, and #4 using the air
screws
1
.
#1
2
, #2
3
, #3
4
, #4
5
SAfter each step, rev the engine two or three
times, each time for less than a second, and
check the synchronization again.
SIf the air screw is removed, turn the screw 3/4
turn in and be sure to synchronize the throttle
body.
Do not use the throttle valve adjusting
screws to adjust the throttle body synchro-
nization.
Vacuum pressure at engine
idling speed
29 kPa
(218 mmHg, 8.5827 inHg)
The difference in vacuum pressure between
two throttle bodies should not exceed 1.33 kPa
(10 mmHg, 0.39 inHg).