Adjusting The Engine Idling Speed - Yamaha 2009 XP500Y TMAX Service Manual

ECA14900
NOTICE
Do not use the throttle valve adjusting
screws to adjust the throttle body syncroni-
zation.
Carburetor angle driver
90890-03158
Intake vacuum
33.0 kPa (9.7 inHg) (248 mmHg)
TIP
The difference in vacuum pressure between the
two cylinders should not exceed 1.33 kPa (10
mmHg).
L LLL L LLL L L LLL L L LLL L
8. Measure:
• Engine idling speed
Out of specification → Adjust.
Make sure that the vacuum pressure is within
specification.
9. Stop the engine and remove the measuring
equipment.
10.Adjust:
• Throttle cable free play
Refer to "ADJUSTING THE THROTTLE CA-
BLE FREE PLAY" on page 3-9.
Throttle cable free play
3.0–5.0 mm (0.12–0.20 in)
11.Install:
• Synchronizing pipe caps
12.Install:
• Bottom cowling
Refer to "GENERAL CHASSIS" on page 4-1.
EAS20610

ADJUSTING THE ENGINE IDLING SPEED

TIP
Prior to adjusting the engine idling speed, the
throttle body synchronization should be adjusted
properly, the air filter element should be clean,
and the engine should have adequate compres-
sion.
1. Start the engine and let it warm up for several
minutes.
2. Remove:
• Left side panel
• Right center panel
Refer to "GENERAL CHASSIS" on page 4-1.
L LLL L L LLL L LLL
3-8
3. Install:
• Digital tachometer
(onto the spark plug lead of cylinder #1)
Digital tachometer
90890-06760
YU-39951-B
4. Check:
• Engine idling speed
Out of specification → Adjust.
Engine idling speed
1100–1300 r/min
5. Adjust:
• Engine idling speed
M MMM M MMM M M MMM M M MMM M
a. Turn the idling speed adjusting screw "1" in
direction "a" or "b" until the specified engine
idling speed is obtained.
Direction "a"
Engine idling speed is increased.
Direction "b"
Engine idling speed is decreased.
L LLL L LLL L L LLL L L LLL L
6. Install:
• Right center panel
• Left side panel
Refer to "GENERAL CHASSIS" on page 4-1.
7. Adjust:
• Throttle cable free play
Refer to "ADJUSTING THE THROTTLE CA-
BLE FREE PLAY" on page 3-9.
Throttle cable free play
3.0–5.0 mm (0.12–0.20 in)
ENGINE
M MMM M M MMM M MMM
a
b
1
L LLL L L LLL L LLL