Yamaha YZF-R125 Service Manual: Engine

Installing the drive chain
1. Lubricate: Drive chain Master link 2. Install: Drive sprocket Drive sprocket retainer bolts 3. Install: Master link O-rings Master link plate Master link clip "1" ...

Engine removal
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Other materials:

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 circui ...

Checking the fuses
The following procedure applies to all of the fuses. CAUTION:To avoid a short circuit, always turn the main switch to "OFF" when checking or replacing a fuse. 1. Remove: Rider seat Refer to "GENERAL CHASSIS" on page 4-1. 2. Check: Fuse a. Connect the pocket te ...

Starting the engine
In order for the ignition circuit cut-off system to enable starting, one of the following conditions must be met: The transmission is in the neutral position. The transmission is in gear with the clutch lever pulled and the sidestand up. 1. Turn the key to "ON" and make sure ...

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