Yamaha YZF-R125 Service Manual: Assembling the water pump

1. Install:

  • Water pump seal "1"
    (into the water pump housing "2")
CAUTION:

Never lubricate the water pump seal surface with oil or grease.

NOTE:

  • Install the water pump seal with the special tools.
  • Install the water pump seal with the special tools to the specified depth as shown in the illustration.

Assembling the water pump


A. Push down

3. Mechanical seal installer

4. Middle driven shaft bearing driver

Assembling the water pump


a. 0-0.5 mm (0-0.02 in)

2. Lubricate:

  • Water pump seal lip

3. Install:

  • Water pump housing gasket "1"

  • Water pump housing plate "2"
  • Impeller shaft
  • Impeller shaft retainer "3"

NOTE:

  • Before installing the impeller shaft retainer, lubricate the slit on the impeller shaft end with a thin coat of lithium-soap-based grease.
  • Install the water pump housing gasket, water pump housing plate, and impeller shaft retainer as shown in the illustration.
  • After installation, check that the impeller shaft rotates smoothly.

Assembling the water pump


    Checking the water pump
    1. Check: Water pump housing cover Water pump housing Cracks/damage Replace. Impeller shaft Cracks/damage/wear Replace. Bearing Rough movement Replace. Radiator outlet hose Crac ...

    Installing the water pump
    1. Install: Water pump assembly "1" O-rings "2" NOTE: Align the projection "a" on the impeller shaft with the slit "b" on the camshaft sprocket bolt. Lubricate the O-rings with a thi ...

    Other materials:

    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 " ...

    Checking the front wheel
    1. Check: Front wheel axle Roll the wheel axle on a flat surface. Bends → Replace. WARNINGDo not attempt to straighten a bent wheel axle. 2. Check: Tire Front wheel Damage/wear → Replace. Refer to "CHECKING THE TIRES" on page 3-23 and "CHECKING TH ...

    Setting the normal mode
    NOTE: The engine speed, coolant temperature, and fault code, if detected, can be displayed on the LCD of the FI diagnostic tool when the tool is connected to the vehicle and is set to the normal mode. 1. Set the main switch to "OFF" and the engine stop switch to "". 2. Disconnect the self- ...

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