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.
A. Push down
3. Mechanical seal installer
4. Middle driven shaft bearing driver
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.
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:
Removing the front brake caliper
NOTE:
Before disassembling the brake caliper, drain
the brake fluid from the entire brake system.
1. Remove:
Brake hose union bolt "1"
Copper washers "2"
Brake hose "3"
NOTE:
Put the end of the brake hose into a container
and pump out the brake fluid carefully.
...
Checking the clutch boss
1. Check:
Clutch boss splines
Damage/pitting/wear Replace the
clutch
boss.
NOTE:
Pitting on the clutch boss splines will cause erratic
clutch operation.
Checking the pressure plate
1. Check:
Pressure plate
Cracks/damage Replace.
Checking the clutch push lever and short clutch push ...
Troubleshooting
The starter motor fails to turn.
NOTE:
Before troubleshooting, remove the following part(s):
1. Seats
2. Fuel tank
3. Left lower side cowling
4. Left upper side cowling
...