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 operationGenerator inspection
Generator coil resistance
Remove the left side cowling. Refer to “exterior parts removal and
installation” in section 9d .
Disconnect the generator coupler (1).
Measure the resistance between the three lead
wires.
If the resistance is out of specified value, replace the
...
Excva pulley inspection
Inspect the excva pulley in the following procedures:
remove the excva pulley. Refer to “excv cable removal and installation”
.
Visually inspect the excva pulley for wear and
damage. If there is anything unusual, replace the
pulley with a new one.
Install the pulle ...
Battery runs down quickly
Troubleshooting
Step
Action
Yes
No
1
Check accessories which use excessive amounts of
electricity.
Are accessories being installed?
Remove accessories.
Go to step 2.
2
Check the battery for current leakage. Refer to “battery
cu ...