Yamaha YP125R Service Manual

4
CHASSIS
GENERAL CHASSIS.......................................................................................4-1
REMOVING THE STORAGE BOX............................................................4-2
INSTALLING THE SEAT ...........................................................................4-2
FRONT WHEEL...............................................................................................4-9
REMOVING THE FRONT WHEEL..........................................................4-11
DISASSEMBLING THE FRONT WHEEL................................................4-11
CHECKING THE FRONT WHEEL ..........................................................4-11
ASSEMBLING THE FRONT WHEEL......................................................4-12
ADJUSTING THE FRONT WHEEL STATIC BALANCE .........................4-12
INSTALLING THE FRONT WHEEL (FRONT BRAKE DISC)..................4-13
REAR WHEEL...............................................................................................4-15
REMOVING THE REAR WHEEL ............................................................4-16
CHECKING THE REAR WHEEL.............................................................4-16
ADJUSTING THE REAR WHEEL STATIC BALANCE............................4-16
INSTALLING THE REAR WHEEL (REAR BRAKE DISC) ......................4-16
FRONT BRAKE.............................................................................................4-17
INTRODUCTION.....................................................................................4-22
CHECKING THE FRONT BRAKE DISC .................................................4-22
REPLACING THE FRONT BRAKE PADS ..............................................4-23
REMOVING THE FRONT BRAKE CALIPER..........................................4-24
DISASSEMBLING THE FRONT BRAKE CALIPER................................4-24
CHECKING THE FRONT BRAKE CALIPER ..........................................4-24
ASSEMBLING THE FRONT BRAKE CALIPER ......................................4-25
INSTALLING THE FRONT BRAKE CALIPER ........................................4-25
REMOVING THE FRONT BRAKE MASTER CYLINDER .......................4-26
CHECKING THE FRONT BRAKE MASTER CYLINDER........................4-26
ASSEMBLING THE FRONT BRAKE MASTER CYLINDER ...................4-26
INSTALLING THE FRONT BRAKE MASTER CYLINDER......................4-27
REAR BRAKE ...............................................................................................4-29
INTRODUCTION.....................................................................................4-37
CHECKING THE REAR BRAKE DISC....................................................4-37
REPLACING THE REAR BRAKE PADS (YP125R)................................4-37
REPLACING THE REAR BRAKE PADS (YP250R)................................4-38
REMOVING THE REAR BRAKE CALIPER ............................................4-39
DISASSEMBLING THE REAR BRAKE CALIPER (YP250R only)..........4-39
CHECKING THE REAR BRAKE CALIPER (YP125R) ............................4-40
CHECKING THE REAR BRAKE CALIPER (YP250R) ............................4-40
ASSEMBLING THE REAR BRAKE CALIPER ........................................4-41
INSTALLING THE REAR BRAKE CALIPER (YP125R) ..........................4-41
INSTALLING THE REAR BRAKE CALIPER (YP250R) ..........................4-42
REMOVING THE REAR BRAKE MASTER CYLINDER .........................4-43
CHECKING THE REAR BRAKE MASTER CYLINDER ..........................4-43
ASSEMBLING THE REAR BRAKE MASTER CYLINDER......................4-44
INSTALLING THE REAR BRAKE MASTER CYLINDER........................4-44

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)