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 DiscElectronic Steering Damper Warning Indicator Light
The yellow light functions as the
electronic steering damper warning indicator.
The light and warning symbol
"ESD" go on if there is a malfunction in
the electronic steering damper system.
However, this could also be caused by
trouble with the charging system (e.g.
battery). I ...
Rebound Damping Force Adjustment
To adjust the rebound damping force, turn the rebound
damping adjuster [A].
The standard adjuster setting is the 3 3/4 turns out from
the fully clockwise position.
WARNINGIf both adjusters are not adjusted
equally, handling
may be impaired and a hazardous condition may
res ...
Break-in
The first 1 600 km (1 000 mi) that the motorcycle is ridden is designated
as the
break-in period. If the motorcycle is not used carefully during this period, you
may
very well end up with a “broken down” instead of a “broken in” motorcycle after
a
few thousand kilometers.
The fol ...