Yamaha YFZ450S 2003 Service Manual page 246

a
b
1
L
L Y
Y
B/L
2
( GRAY )
d
c
3
Y L
B/L
B
( GRAY )
CARBURETOR
INSTALLING THE CARBURETOR
1. Install:
• carburetor
NOTE:
Align the projection a on the carburetor with
the slot b in the carburetor joint, and then
align the projection c on the carburetor with
the slot d in the air intake duct.
2. Install:
• throttle cable
• throttle cable cover
3. Adjust:
• throttle lever free play
Refer to "ADJUSTING THE THROTTLE
LEVER FREE PLAY" in chapter 3.
4. Adjust:
• engine idling speed
Refer to
IDLING SPEED" in chapter 3.
EAS00502
CHECKING AND ADJUSTING THE
THROTTLE POSITION SENSOR
NOTE:
_
Before adjusting the throttle position sensor,
the engine idling speed should be properly
adjusted.
1. Check:
• throttle position sensor
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a. Turn the main switch to "ON".
b. Connect the pocket tester (20 V DC) to the
throttle position sensor.
Tester positive lead → blue 1
Tester negative lead → black 2
c. Check the throttle position sensor input volt-
age.
Out of specification → Check the wire har-
ness between battery and C.D.I. unit and
throttle position sensor.
Throttle position sensor input
voltage
5 V (blue and black)
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6 - 9
CARB
"ADJUSTING THE
M M MMM M M MMM M
L L LLL L L LLL L
ENGINE
M MMM M MMM
L LLL L LLL