Yamaha XVS1100(L) Service Manual page 65

SYNCHRONIZING THE CARBURETORS
5. Install:
S vacuum gauge 1
S engine tachometer 2
(to the spark plug lead of cyl. #2)
Vacuum gauge:
90890-03094
Engine tachometer:
90890-03113
6. Start the engine and let it warm up for several
minutes.
7. Check:
S engine idling speed
Out of specification ! Adjust.
Refer to "ADJUSTING THE ENGINE IDLING
SPEED".
Engine idling speed:
950 X 1,050 r/min
8. Adjust:
S Carburetor synchronization
a. Synchronize carburetor #1 to carburetor #2
by turning the synchronizing screw 1 in ei-
ther direction until both gauges read the
same.
b. Rev the engine two or three times, each time
for less than a second, and check the syn-
chronization again.
Vacuum pressure at idle speed:
34.7 X 37.3 kPa (260 X 280 mmHg)
NOTE:
The difference between the two carburetors
should not exceed 1.33 kPa (10 mmHg).
9. Check:
S engine idling speed
Out of specification ! Adjust.
10. Stop the engine and remove the measuring
equipment.
11. Adjust:
S throttle cable free play
Refer to "ADJUSTING THE THROTTLE
CABLE FREE PLAY".
3-9
INSP
ADJ