Assembling The Rear Brake Caliper; Installing The Rear Brake Caliper - Yamaha YZF-R125 Service Manual

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EWA5D71012
WARNING
Whenever a brake caliper is disassembled,
replace the brake caliper piston dust seals
and piston seals.
2. Check:
• Brake caliper bracket
Cracks/damage → Replace.
EAS22650

ASSEMBLING THE REAR BRAKE CALIPER

EWA5D71017
WARNING
• 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 seal and piston seal to swell
and distort.
• Whenever a brake caliper is disassembled,
replace the brake caliper piston dust seal
and piston seal.
Recommended fluid
DOT 4
EAS22670

INSTALLING THE REAR BRAKE CALIPER

1. Install:
• Brake caliper "1"
• Copper washers
• Brake hose "2"
• Union bolt "3"
Brake hose union bolt
30 Nm (3.0 m·kg, 22 ft·lb)
EWA13530
WARNING
Proper brake hose routing is essential to in-
sure safe vehicle operation. Refer to "CABLE
ROUTING" on page 2-33.
ECA5D71030
CAUTION:
When installing the brake hose onto the
brake caliper, be sure to position the brake
pipe "a" into the slot "b" in the brake caliper.
New
2. Install:
• Brake pad spring
• Brake pads
• Brake pad retaining bolts
• Rear brake caliper
Refer to "REPLACING THE REAR BRAKE
PADS" on page 4-33.
Rear brake pad retaining bolt
18 Nm (1.8 m·kg, 13 ft·lb)
LOCTITE®
3. Install:
• Rear wheel
Refer to "REAR WHEEL" on page 4-12.
4. Fill:
• Brake fluid reservoir
(with the specified amount of the recom-
mended brake fluid)
Recommended fluid
DOT 4
EWA13090
WARNING
• 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.
• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor lock.
ECA13540
CAUTION:
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean up
any spilt brake fluid immediately.
4-36
REAR BRAKE
3
2
a
b
1