Yamaha YBR 125 fuel injection pump removal / refitting ( how to fit )

Yamaha YBR 125 for sale on Ebay UK 

Yamaha YBR 125 parts for sale on Ebay UK

Yamaha YBR 125 workshop manuals on Ebay UK

To fix the internal motor or clean the "tea-bag" filter, you first need to get the pump out of the tank. For the YBR 125, this is a two-stage process.

Stage 1: Removing the Tank from the Bike

1. Drain the Fuel: Don't try this with a full tank (12+ litres is heavy and dangerous). Use a siphon or run the bike until it's nearly empty.

2. Remove the Seat & Side Panels: Take off the seat and the two side fairings to reveal the tank mounting bolts.

3. Unbolt the Rear: There is one main 10mm or 12mm bolt at the back of the tank (under where the seat was). Remove this.

4. The "Quick-Release" Challenge: Lift the back of the tank slightly. You will see two connections:

   • The Electrical Plug: A simple plastic clip for the fuel pump and gauge. Unplug it.

   • The Fuel Line: This has a green or orange plastic locking clip. Slide the clip back and gently pull the hose.

   • Pro-Tip: Have a rag ready. A small amount of "residual" fuel will spill out.

5. Lift and Slide: Slide the tank backwards off the rubber "pucks" at the front of the frame.

Stage 2: Removing the Pump from the Tank

1. Flip the Tank: Place the tank upside down on something soft (like an old tyre or a thick towel) so you don't scratch the paint.

2. The 10mm Nuts: You will see a circular metal ring held down by six 10mm nuts.

3. The "Star Pattern": Loosen these nuts in a cross-pattern (like wheel nuts on a car). This prevents the metal flange from warping.

4. The Extraction: Gently wiggle the pump assembly upwards.

   • Warning: The fuel level float arm is attached to the side. You have to tilt the pump at an angle to "fish" the long wire arm out of the hole without bending it.

2026 Resilience Check:

While the tank is off, check the rubber mounting pucks on the frame. If they are perished or missing, your tank will vibrate, which can eventually crack the fuel pump's plastic housing—a costly "maintenance debt" you don't want.

just a quick post as today i had to change a fuel pump over , very easy job to do .
best to pressure check the fuel pump after fitting to ensure correct operating pressure . see if there are any fuel pumps on ebay uk here or on Amazon uk here  .

you can also buy the internal pump unit for cheaper here on amazon uk  or ebay here.




other post of interest
Yamaha YBR 125 Fuel pump repair < replace internal fuel pump unit                  




                 First mark exact pipe outlet position with marker

                               Remove the allen key headed bolts

                                       remove clamp

 remove the pump from the tank be careful of the sender units float

                                          The fuel pump itself

                 Refitting is as easy as taking out just make sure the seal
                                     below is fitted correctly .

make sure the outlet aligned with removal mark 

finger tighten the bolts 

                            then tighten the bolts in sequence

     i would then fit pressure tester and fit to bike to line test pressure

see more Yamaha YBR 125 blog posts