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 operationRear wheel components
Rear axel nut
Collar
Dust seal
Bearing
Retainer
Rear sprocket
Sprocket mounting drum
Wheel damper
Bearing
Spacer
Air valve
Rear wheel
Wheel balancer
Rear tire
Dust seal
Collar
Rear brake disc
Rear axle
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Specifications
Service data
Oil pump
Oil
Tightening torque specifications
Reference: for the tightening torque of fastener not specified in this
section, refer to “tightening torque list” in section 0c . ...
Fi system troubleshooting
Customer complaint analysis
Record details of the problem (failure, complaint) and how it occurred as
described by the customer. For this purpose,
use of such an inspection form such as following will facilitate collecting
information to the point required for proper
analysis and diagnosis.
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