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Brake Disk; Brake Disc Inspection; Brake Disc Removal; Brake Disc Installation - Kawasaki KX250F Service Manual

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12-20 BRAKES

Brake Disk

Brake Disc Inspection

Visually inspect the disc [A].
If it is scratched or damaged, replace the disc.
Measure the thickness of each disc at the point [B] where
it has worn the most.
Replace the disc if it has worn past the service limit.
Thickness
Standard:
2.85 ∼ 3.15 mm (0.112 ∼ 0.124 in.)
Front
3.85 ∼ 4.15 mm (0.152 ∼ 0.163 in.)
Rear
Service Limit:
Front
2.5 mm (0.10 in.)
Rear
3.5 mm (0.14 in.)
Place a jack under the motorcycle so that the front/rear
wheel is raised off the ground.
Special Tool - Jack: 57001-1238
Set up a dial gauge against the disc [A] as illustrated.
For the front disc, turn the handlebar fully to one side.
Measure the disc runout while rotating the wheel slowly
[B].
If the runout exceeds the service limit, replace the disc.
Runout
Standard:
Not more than 0.25 mm (0.098 in.)
Service Limit: 0.3 mm (0.01 in.)

Brake Disc Removal

Remove the wheel (see Front Wheel Removal, Rear
Wheel Removal in the Wheels/Tires chapter).
Unscrew the mounting bolts, and take off the disc.

Brake Disc Installation

Install the brake disc on the wheel so that the marked side
[A] faces out.
Apply a non-permanent locking agent to the threads of
the rear brake disc mounting bolts [B].
Tighten:
Torque - Rear Brake Disc Mounting Bolts: 23 N·m (2.3
kgf·m, 16.6 ft·lb)
Front Brake Disc Mounting Bolts: 9.8 N·m (1.0
kgf·m, 87 in·lb)

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