If a master cylinder or piston shows any damage, replace them.

If a cup is worn, damaged softened (rotted), or swollen, the piston assembly should be replaced to renew the cups.
If fluid leakage is noted at the brake lever, the piston assembly should be replaced to renew the cups.
If they are damaged, replace them.
If the springs are damaged, replace them.
If the relief port becomes plugged, the brake pads will drag on the disc. Blow the ports clean with compressed air.
Front Master Cylinder [I] Rear Master Cylinder [J]

Rear Master Cylinder Installation
Brake DiscFront Brake Pad Installation
Check that the pad spring [A] is in place on the caliper.
Push the caliper pistons in by hand as far as they will go.
Install the brake pads [A] on the pad spring correctly.
Fit the pad into the groove of the caliper as shown in the
figure.
Install the pad pins while pushing t ...
Steering Play Adjustment
Remove:
Steering Stem Head with Handlebars (see Handlebar
Removal in the Steering chapter).
Bend the claws [A] of the claw washer [B] straighten.
Remove:
Steering Stem Locknut [C]
Claw Washer
Adjust the steering using the steering stem nut wrench
[A].
Special Tool - Ste ...
Serial number locations
The engine and frame serial numbers are used to register the motorcycle.
They
are the only means of identifying your particular machine from others of the
same
model type. These serial numbers may be needed by your dealer when ordering
parts. In the event of theft, the investigating authoriti ...