Yamaha YZF-R125 Service Manual: 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.
3. Remove:
- Throttle body
| CAUTION: Do not remove the throttle body sensor assembly "1" from the throttle body. |
Checking the fuel injector
1. Check:
- Fuel injector
Damage
Replace.
Throttle body
...
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:
Battery
A poorly maintained battery will corrode
and discharge quickly. The electrolyte
level, battery lead connections and
breather hose routing should be
checked before each ride and at the intervals
specified in the periodic maintenance
and lubrication chart.
WARNING
Electrolyte is pois ...
Checking the shift forks
The following procedure applies to all of the shift
forks.
1. Check:
Shift fork cam follower "1"
Shift fork pawl "2"
Bends/damage/scoring/wear
Replace the
shift fork.
2. Check:
Shift fork guide bar
Roll the shift fork guide bar on a flat surface.
Bends Replace. ...
Checking the rear brake caliper
1. Check:
Brake caliper piston "1"
Rust/scratches/wear Replace the
brake
caliper piston.
Brake caliper cylinder "2"
Scratches/wear Replace the
brake caliper
assembly.
Brake caliper body "3"
Cracks/damage Replace the
brake caliper
assembly.
Brake fluid deli ...