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 operationTampering 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 ...
Spring pre-load adjustment
To change the spring pre-load,
turn the adjuster 1 clockwise or
counterclockwise. Turning the
adjuster clockwise will increase
the spring pre-load. Turning the
adjuster counterclockwise will
decrease the spring pre-load.
There are five grooved lines on
the side of the adjuster 1 for re ...
Specifications
Tightening torque specifications
Note
the specified tightening torque is described in the following.
“Rear view mirror construction”
Reference: for the tightening torque of fastener not specified in this
section, refer to “tightening torque list” in section 0c . ...