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:

Adjusting the throttle cable free play
Throttle cable free play The throttle cable free play should measure 3.0-5.0 mm (0.12-0.20 in) at the throttle grip. Periodically check the throttle cable free play and, if necessary, adjust it as follows. TIP The engine idling speed must be correctly adjusted before checkin ...

Adjusting the front wheel static balance
NOTE: After replacing the tire, wheel or both, the front wheel static balance should be adjusted. Adjust the front wheel static balance with the brake discs installed. 1. Remove: Balancing weight(s) 2. Find: Front wheel's heavy spot NOTE: Place the front wheel on a suitab ...

Rear wheel
To remove the rear wheel WARNING To avoid injury, securely support the vehicle so there is no danger of it falling over. Loosen the axle nut. Axle nut Drive chain slack adjusting bolt Locknut Brake caliper Lift the rear wheel off the ground according to the pr ...