Yamaha YZF-R125 Service Manual: Electrical components

Electrical components


1. Main switch

2. Clutch switch

3. Front brake light switch

4. Ignition coil

5. Throttle body sensor assembly (intake air pressure sensor, intake air temperature sensor, throttle position sensor)

6. FID (fast idle solenoid)

7. Rectifier/regulator

8. Lean angle sensor

9. Starting circuit cut-off relay

10.Turn signal relay

11.Radiator fan motor relay

12.Headlight relay

13.ECU (engine control unit)

14.Fuse box

15.Starter relay

16.Battery

17.Rear brake light switch

18.Sidestand switch

19.Neutral switch

20.Crankshaft position sensor

21.Coolant temperature sensor

22.Speed sensor

23.Radiator fan

24.Horn

Troubleshooting
If the fuel pump fails to operate. NOTE: Before troubleshooting, remove the following part(s): 1. Rider seat 2. Fuel tank ...

Checking the switches
1. Clutch switch 2. Main switch 3. Front brake light switch 4. Sidestand switch 5. Rear brake light switch 6. Neutral switch 7. Turn signal switch 8. Horn switch 9. Dimmer switch 10.Pass ...

Other materials:

Installing the throttle body
1. Install: Throttle body joint clamps NOTE: Align the projections "a" on the throttle body joint with the slot "b" in each throttle body joint clamp. 2. Install: Throttle body joint NOTE: Align the projection "a" on the throttle body joint with the slot "b" in the intake mani ...

Protective apparel
The majority of fatalities from motorcycle accidents are the result of head injuries. The use of a safety helmet is the single most critical factor in the prevention or reduction of head injuries. Always wear an approved helmet. Wear a face shield or goggles. Wind in your unprotecte ...

Installing the rear shock absorber assembly
1. Install: Rear shock absorber assembly Relay arm "1" NOTE: Install the relay arm as shown in the illustration. 2. Tighten: Rear shock absorber assembly upper nut Relay arm nut Rear shock absorber assembly lower nut 3. Install: Connecting arms NOTE: When ins ...

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