Yamaha YZF-R125 Service Manual: Removing the throttle body

Yamaha YZF-R125 Service Manual / Fuel system / Throttle body / Removing the throttle body

1. Extract the fuel in the fuel tank through the fuel tank filler hole with a pump.

2. Disconnect:

Fuel hose

WARNING

Cover the fuel hose connections with a cloth when disconnecting them. Residual pressure in the fuel lines could cause fuel to spurt out when removing the hoses.

NOTE:

To remove the fuel hose from the fuel injector, slide the fuel hose connector cover "1" on the end of the hose in the direction of the arrow shown, press the two buttons "2" on the sides of the connector, and then remove the hose.
Remove the fuel hose manually without using any tools.
Before removing the hose, place a few rags in the area under where it will be removed.

Removing the throttle body

3. Remove:

Throttle body

CAUTION:

Do not remove the throttle body sensor assembly "1" from the throttle body.

Removing the throttle body

Checking the fuel injector

1. Check:

Fuel injector Damage Replace.

Checking the throttle body

1. Check: Throttle body Cracks/damage Replace the throttle body. 2. Check: Fuel passages Obstruction Clean. a. Wash the throttle body in a petroleum-based solvent. Do not us ...

Other materials:

Checking and lubricating the brake and shift pedals
Brake pedal Brake pedal Shift pedal Shift pedal The operation of the brake and shift pedals should be checked before each ride, and the pedal pivots should be lubricated if necessary. Recommended lubricant:Lithium-soap-based grease ...

Removing the primary drive gear and balancer gears
1. Loosen: Primary drive gear nut "1" NOTE: Place the aluminum plate "a" between the balancer drive gear "2" and the balancer driven gear "3", and then loosen the primary drive gear nut. 2. Straighten the lock washer tab. 3. Loosen: Balancer driven gear nut "1" NOTE: Place ...

Checking the steering head
1. Wash: Bearings Bearing races 2. Check: Bearings Bearing races Damage/pitting →Replace. 3. Replace: Bearings Bearing races a. Remove the bearing races from the steering head pipe with a long rod "1" and hammer. b. Remove the bearing race from the lower bracket ...