Yamaha YP125R Service Manual

WATER PUMP (YP125R)
6-6
EAS37P1112
DISASSEMBLING THE WATER PUMP
1. Remove:
• Water pump seal “1”
T
IP
Remove the water pump seal from the inside of
the water pump housing “2”.
2. Remove:
• Bearing “1”
T
IP
Remove the bearing from the outside of the wa-
ter pump housing “2”.
EAS37P1113
CHECKING THE WATER PUMP
1. Check:
• Water pump housing cover
• Water pump housing
• Impeller shaft
Cracks/damage/wear → Replace.
2. Check:
• Bearing
Rough movement → Replace.
EAS37P1114
ASSEMBLING THE WATER PUMP
1. Install:
• Water pump seal “1”
(into the water pump housing “2”)
T
IP
Install the water pump seal with the special tools
to the specified depth as shown in the illustra-
tion.
2. Lubricate:
• Water pump seal
3. Install:
• Impeller shaft
• Water pump housing plate gasket “1”
• Water pump housing plate 2 “2”
1
2
2
1
New
Installed depth of water pump
seal
0–0.5 mm (0–0.02 in)
Mechanical seal installer
90890-04145
Middle driven shaft bearing driv-
er
90890-04058
Bearing driver 40 mm
YM-04058
A. Push down
3. Mechanical seal installer
4. Middle driven shaft bearing driver
a. Installed depth of water pump seal
Recommended lubricant
Lithium-soap-based grease
1
2
3
4
A
a
New

Yamaha YP125R Specifications

General

Engine Type	Liquid-cooled, 4-stroke, SOHC, 4-valve
Bore x Stroke	52.4 mm x 57.9 mm
Fuel System	Fuel Injection
Ignition System	TCI
Transmission	V-Belt Automatic
Front Suspension	Telescopic fork
Rear Suspension	Unit Swing
Front Brake	Hydraulic single disc, Ø267 mm
Starter System	Electric
Rear Tyre	140/70-14M/C 62P (Tubeless)