Yamaha WR400F(M) - TPS Replacement and Adjustment

6 - 9
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ELEC
TPS (THROTTLE POSITION SENSOR) SYSTEM
TPS REPLACEMENT AND ADJUSTMENT
1. Remove:
● TPS coupler
● Screw (TPS) 1
● Plain washer 2
● TPS 3
2. Replace:
● TPS
3. Install:
● TPS 1
● Plain washer 2
● Screw (TPS) 3
● TPS coupler
NOTE:
● Align the slot a in the TPS with the projec-
tion b on the carburetor.
● Temporarily tighten the screws (TPS).
4. Adjust:
● Idle speed
Refer to “IDLE SPEED ADJUSTMENT”
section in the CHAPTER 3.
5. Calculate:
● TPS coil resistance at idle speed.
<Example>
If the TPS coil resistance is 5 kΩ, then the TPS
coil resistance at idle speed is:
5 kΩ × (0.13 ~ 0.15) = 650 ~ 750 Ω
Refer to “TPS COIL INSPECTION” sec-
tion about the TPS coil resistance.
TPS coil resistance at idle speed:
TPS coil resistance × (0.13 ~ 0.15)