Yamaha YZ450F 2008 Manuel D'atelier Du Proprietaire page 175

Throttle po-
Tester se-
sition sen-
lector posi-
sor output
voltage
0.58–0.78 V
10. Put the aligning marks "a" on the
throttle position sensor and car-
buretor.
11. Stop the engine.
12. Remove the carburetor.
13. Tighten:
• Screw (throttle position sensor)
"1"
Tighten the screw (throttle position
sensor) using the T25 bit.
14. Install the carburetor.
CHECKING THE THROTTLE
POSITION SENSOR INPUT
VOLTAGE
1. Disconnect the throttle position
sensor coupler.
2. Start the engine.
3. Inspect:
• Throttle position sensor input volt-
age
→
Out of specification
the CDI unit.
→
Tester (+) lead Blue lead "1"
→
Tester (-) lead Black/Blue lead
"2"
THROTTLE POSITION SENSOR SYSTEM
Throttle po-
tion
DCV
Replace
Tester se-
sition sen-
lector posi-
sor input
tion
voltage
4–6 V DCV-20
6-7