Removing The Rear Brake Master Cylinder; Checking The Rear Brake Master Cylinder; Assembling The Rear Brake Master Cylinder; Installing The Rear Brake Master Cylinder - Yamaha MBK MW125 2014 Service Manual

7. Check:
• Brake lever operation
Soft or spongy feeling → Bleed the brake sys-
tem.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-12.
EAS30193
REMOVING THE REAR BRAKE MASTER
CYLINDER
TIP
Before removing the rear brake master cylinder,
drain the brake fluid from the entire brake sys-
tem.
1. Remove:
• Rear brake lever pivot nut
• Rear brake lever pivot bolt
ECA21640
NOTICE
The rear brake lever pivot bolt and nut have
left-hand threads. To loosen the pivot bolt
and nut, turn them clockwise.
2. Remove:
• Brake hose union bolt "1"
• Copper washers "2"
• Brake hose "3"
TIP
To collect any remaining brake fluid, place a
container under the master cylinder and the end
of the brake hose.
2
1
a
3
4-57
EAS30194
CHECKING THE REAR BRAKE MASTER
CYLINDER
1. Check:
• Brake master cylinder
Damage/scratches/wear → Replace.
• Brake fluid delivery passages
(brake master cylinder body)
Obstruction → Blow out with compressed air.
2. Check:
• Brake master cylinder kit
Damage/scratches/wear → Replace.
3. Check:
• Brake master cylinder reservoir cap
• Brake master cylinder reservoir diaphragm
holder
• Brake master cylinder reservoir diaphragm
Damage/wear → Replace.
4. Check:
• Rear brake hose
Cracks/damage/wear → Replace.
EAS30195
ASSEMBLING THE REAR BRAKE MASTER
CYLINDER
EWA13520
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.
Specified brake fluid
YAMAHA GENUINE BRAKE
FLUID (DOT 4)
EAS30196
INSTALLING THE REAR BRAKE MASTER
CYLINDER
1. Install:
• Brake master cylinder
• Brake master cylinder holder "1"
Rear brake master cylinder hold-
er bolt
11 Nm (1.1 m·kgf, 8.0 ft·lbf)
TIP
• Install the brake master cylinder holder with the
"UP" mark "a" facing up.
• Align the projection "b" on the brake master cyl-
inder holder with the hole "c" in the handlebar.
• First, tighten the upper bolt, then the lower bolt.
REAR BRAKE