Yamaha 2008 YZ250F Fahrer- Und Wartungshandbuch Seite 178

Measure the output voltage accurate-
ly with a digital electronic voltmeter
that gives an easy reading of a small
voltage.
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
THROTTLE POSITION SENSOR SYSTEM
the CDI unit.
Tester (+) lead
Tester (-) lead
"2"
Throttle po-
tion
DCV
Replace
→
Blue lead "1"
→
Black/Blue lead
Tester se-
sition sen-
lector posi-
sor input
tion
voltage
4–6 V DCV-20
6-7