The exhaust control system (excs) consists of the exhaust control valve (excv), exhaust control valve actuator (excva) and exhaust control valve cables (excv cables).
Excv is installed in the exhaust pipe. Excva is mounted inside of the right frame. The excv is operated by the excva via the cables. This system is designed to improve the engine torque at low engine rpm.

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Exhaust control system operationFront brake disc removal and installation
Removal
Remove the front wheel assembly. Refer to “front wheel assembly removal
and installation” in section 2d .
Remove the front brake disc.
Installation
Install the front brake disc in the reverse order of
removal. Pay attention to the following points:
make sure ...
Specifications
Service data
Electrical
unit: mm (in)
Tightening torque specifications
Reference: for the tightening torque of fastener not specified in this
section, refer to “tightening torque list” in section 0c . ...
Handlebar components
Throttle grip
Grip rubber
Right handlebar switch box
Left handlebar switch box
Right handlebar
Left handlebar
Handlebar expander
Handlebar balancer
Apply handle grip bond.
23
N·m (2.3 Kgf-m, 16.5 Lbf-ft)
5.5 N·m
(0.55 Kgf-m, 4.0 L ...