If they appear damaged or deteriorated, replace them.

Balancer Adjustment
Torque LimiterRear Master Cylinder Removal
Unscrew the brake hose banjo bolt [A] and remove the
brake hose (see Brake Hose and Pipe Replacement in
the Periodic Maintenance chapter).
Remove:
Rear Master Cylinder Mounting Bolts [B]
Foot Guard [C]
Screw and Stopper [D]
Bolt [E]
Front Footpeg Bracket Bolts [F]
Cable Guide [G ...
Meter Unit Inspection
Remove the meter unit (see Meter Unit Removal).
[1] Battery (+)
[2] Fuel Reserve Switch
[3] Ground (–)
[4] Unused
[5] Right Turn Signal Indicator Light (LED) (+)
[6] Left Turn Signal Indicator Light (LED) (+)
[7] High Beam Indicator Light (LED) (+)
[8] Neutral Indicator Light (LED) (в ...
Cylinder (Upper Crankcase) Wear Inspection
Split the crankcase (see Crankcase Splitting).
Remove the pistons (see Piston Removal).
Assemble the cylinder (upper crankcase) [A], the cylinder
head [B] and the cylinder head gasket [C].
Tighten the cylinder head bolts (see Cylinder Head Installation
in the Engine Top End chapter).
...