Yamaha YP125R Service Manual

FRONT BRAKE
4-25
2. Check:
• Brake caliper bracket
Cracks/damage → Replace.
EAS22400
ASSEMBLING THE FRONT BRAKE CALIPER
WARNING
EWA37P1011
• Before installation, all internal brake com-
ponents should be cleaned and lubricated
with clean or new brake fluid.
• Never use solvents on internal brake com-
ponents as they will cause the brake caliper
piston dust seals and brake caliper piston
seals to swell and distort.
• Whenever a brake caliper is disassembled,
replace the brake caliper piston dust seals
and brake caliper piston seals.
EAS22420
INSTALLING THE FRONT BRAKE CALIPER
1. Install:
• Front brake caliper “1”
(temporarily)
• Copper washers “2”
• Front brake hose “3”
• Brake hose union bolt “4”
WARNING
EWA37P1024
Proper brake hose routing is essential to in-
sure safe vehicle operation. Refer to “CABLE
ROUTING (YP125R)” on page 2-29 and “CA-
BLE ROUTING (YP250R)” on page 2-75.
NOTICE
ECA14170
When installing the brake hose onto the
brake caliper “1”, make sure the brake pipe
“a” touches the projection “b” on the brake
caliper.
2. Remove:
• Front brake caliper
3. Install:
• Brake pad support
• Brake pad spring
• Brake pads
• Brake pad pin
• Brake pad pin cap
• Front brake caliper
• Speed sensor lead guide
Refer to “REPLACING THE FRONT BRAKE
PADS” on page 4-23.
4. Fill:
• Brake master cylinder reservoir
(with the specified amount of the recom-
mended brake fluid)
WARNING
EWA37P1012
• Use only the designated brake fluid. Other
brake fluids may cause the rubber seals to
deteriorate, causing leakage and poor
brake performance.
• Refill with the same type of brake fluid that
is already in the system. Mixing brake fluids
may result in a harmful chemical reaction,
leading to poor brake performance.
Recommended fluid
DOT 4
T
R
.
.
Front brake hose union bolt
23 Nm (2.3 m·kgf, 17 ft·lbf)
1
2
3
New
T
R
.
.
Brake pad pin
18 Nm (1.8 m·kgf, 13 ft·lbf)
Brake pad pin cap
3 Nm (0.3 m·kgf, 2.2 ft·lbf)
Front brake caliper bolt
40 Nm (4.0 m·kgf, 29 ft·lbf)
Recommended fluid
DOT 4
2
3
1
a
b
4

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)