Yamaha YP125R Service Manual

FRONT WHEEL
4-11
EAS21890
REMOVING THE FRONT WHEEL
1. Stand the vehicle on a level surface.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
T
IP
Place the vehicle on a suitable stand so that the
front wheel is elevated.
2. Remove:
• Front wheel
T
IP
Do not apply the front brake lever when remov-
ing the front wheel.
EAS21910
DISASSEMBLING THE FRONT WHEEL
1. Remove:
• Oil seal
• Wheel bearings
▼▼▼▼▼▼▼▼▼ ▼ ▼▼▼▼▼▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼▼▼
a. Clean the surface of the front wheel hub.
b. Remove the oil seal “1” with a flat-head
screwdriver.
T
IP
To prevent damaging the wheel, place a rag “2”
between the screwdriver and the wheel surface.
c. Remove the wheel bearings “3” with a gener-
al bearing puller.
▲▲▲▲▲▲▲▲▲ ▲ ▲▲▲▲▲▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲
EAS21920
CHECKING THE FRONT WHEEL
1. Check:
• Wheel axle
Roll the wheel axle on a flat surface.
Bends → Replace.
WARNING
EWA13460
Do not attempt to straighten a bent wheel ax-
le.
2. Check:
• Tire
• Front wheel
Damage/wear → Replace.
Refer to “CHECKING THE TIRES” on page
3-39 and “CHECKING THE WHEELS” on
page 3-41.
3. Measure:
• Radial wheel runout “1”
• Lateral wheel runout “2”
Over the specified limits → Replace.
4. Check:
• Wheel bearings
Front wheel turns roughly or is loose → Re-
place the wheel bearings.
• Oil seal
Damage/wear → Replace.
Radial wheel runout limit
1.0 mm (0.04 in)
Lateral wheel runout limit
0.5 mm (0.02 in)

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)