Yamaha YZF-R125 Service Manual: Assembling the water pump

Yamaha YZF-R125 Service Manual / Cooling system / Water pump / 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:

Checking the front brake master cylinder
1. Check: Brake master cylinder Damage/scratches/wear Replace. Brake fluid delivery passages (brake master cylinder body) Obstruction Blow out with compressed air. 2. Check: Brake master cylinder reservoir Cracks/damage Replace the brake master cylinder. Brake maste ...

Checking the switches
1. Clutch switch 2. Main switch 3. Front brake light switch 4. Sidestand switch 5. Rear brake light switch 6. Neutral switch 7. Turn signal switch 8. Horn switch 9. Dimmer switch 10.Pass switch 11.Engine stop switch 12.Start switch Check each switch for continuity with the pocket tes ...

Removing the piston
1. Remove: Piston pin clips "1" Piston pin "2" Piston "3" CAUTION:Do not use a hammer to drive the piston pin out. NOTE: Before removing the piston pin clip, cover the crankcase opening with a clean rag to prevent the piston pin clip from falling in ...