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 operationSpecifications
Service data
Brake
unit: mm (in)
Tightening torque specifications
Note
the specified tightening torque is described in the following.
“Rear brake components”
Reference: for the tightening torque of fastener not specified in this
section, refer to “tightening torqu ...
Specifications
Service data
Electrical
unit: mm
Caution
never use anything except the specified battery.
Tightening torque specifications
Note
the specified tightening torque is described in the following.
“Regulator / rectifier construction”
Reference: for the tig ...
Tampering with noise control system prohibited
Federal law prohibits the following
acts or the causing there of;
The removal or rendering inoperative
by any person other
than for purposes of maintenance,
repair, or replacement,
of any device or element of
·design incorporated into any
new vehicle for the purpose of
noise ...