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 the rear shock absorber assembly
1. Check: Rear shock absorber rod Bends/damage Replace the rear shock absorber assembly. Rear shock absorber Oil leaks Replace the rear shock absorber assembly. Spring Damage/wear Replace the rear shock absorber assembly. Bushing Damage/wear Replace the rea ...

Assembling the front wheel
1. Install: Wheel bearings Oil seal a. Install the new wheel bearings and oil seal in the reverse order of disassembly. CAUTION:Do not contact the wheel bearing inner race "1" or balls "2". Contact should be made only with the outer race "3". NOTE: Use a socket " ...

Adjusting the engine idling speed
The engine idling speed must be checked and, if necessary, adjusted as follows at the intervals specified in the periodic maintenance and lubrication chart. The engine should be warm before making this adjustment. Remove panel A. Check the engine idling speed and, if necessary, ...