Yamaha XJR1300(L) 99, Service Manual

Page: 67 / 338

3-9
CHK
ADJ
SYNCHRONIZING THE CARBURETORS
NOTE:
NOTE:
NOTE:
EAS00050
SYNCHRONIZING THE CARBURETORS
Prior to synchronizing the carburetors, the valve
clearance and the engine idling speed should
be properly adjusted and the ignition timing
should be checked.
1. Stand the motorcycle on a level surface.
Place the motorcycle on a suitable stand.
2. Remove:
S
side covers
S
seat
S
fuel tank
Refer to “SEAT, SIDE COVER AND FUEL
TANK”.
3. Install:
S
vacuum gauge 1
S
engine tachometer 2
(to the spark plug lead of cyl. #1)
Vacuum gauge
90890-03094
Engine tachometer
90890-03113
4. Start the engine and let it warm up for several
minutes.
5. Check:
S
engine idling speed
Out of specification
Adjust.
Refer to “ADJUSTING THE ENGINE IDLING
SPEED”.
Engine idling speed:
1,000 1,100 r / min
6. 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.
After each step, rev the engine two or three
times, each time for less than a second, and
check the synchronization again.