Refer to “front brake master cylinder / brake lever disassembly and assembly” .
Master cylinder
Inspect the master cylinder bore for any scratches or other damage

Piston / rubber parts
Inspect the piston surface for any scratches or other damage.
Inspect the primary cup, secondary cup and dust boot for wear or damage.

Front brake master cylinder / brake lever disassembly and assembly
Rear brake master cylinder componentsTurn signal switch inspection
Inspect the turn signal switch in the following
procedures:
remove the air cleaner box. Refer to “air cleaner box removal and
installation” in section 1d .
Disconnect the left handlebar switch coupler (1).
(Yellow)
Inspect the turn signal switch for continuity wit ...
Throttle valve synchronization
Check and adjust the throttle valve synchronization
among four cylinders.
Start the engine and run it in idling condition
for
warming up.
Stop the warmed-up engine.
Lift and support the fuel tank. Refer to “fuel
tank
removal and installation” in section 1g (page ...
Short circuit check (wire harness to ground)
Disconnect the negative (–) cable from the battery.
Disconnect the connectors/couplers at both ends of
the circuit to be checked.
Note
if the circuit to be checked branches to other
parts as shown, disconnect all connectors/
couplers of those parts. Otherwise, diagnos ...