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 operationStarter motor will not run
Note
make sure the fuses are not blown and the battery is fully-charged
before diagnosing.
Troubleshooting
Step
Action
Yes
No
1
Shift the transmission into neutral.
Grasp the clutch lever, turn on the ignition switch ...
Diagnostic information and procedures
Starting system symptom diagnosis
Condition
Possible cause
Correction / reference item
Engine does not turn
though the starter motor
runs
Faulty starter clutch.
Replace.
Starter button is not
effective
Run down battery
Repair or replac ...
Special tools and equipment
Recommended service material
Note
required service material is also described in the following.
“Front brake master cylinder components” “rear brake master
cylinder components” “rear brake pedal construction”
Special tool
...