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Suzuki GSX-R 1000 Service Manual: Exhaust control system description

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.

Suzuki GSX-R. Exhaust control system description


  1. Exhaust control valve actuator (excva)
  2. Exhaust control valve (excv)
General description
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Exhaust control system operation
The excs is operated by the signal supplied from the ecm. The open/close operation of the excv is performed by the excva which is controlled by the ecm by changing the current direction of the ac ...

Other materials:

Regulated voltage inspection
Inspect the regulated voltage in the following procedures:  remove the front seat. Refer to “exterior parts removal and installation” in section 9d (page 9d- 6).  Start the engine and keep it running at 5 000 r/min with the dimmer switch turned hi position. Measure the dc vo ...

Serial number location
You need to know the frame and engine serial numbers to get title documents for your motorcycle. You also need these numbers to help your dealer when you order parts. The frame number 1 is stamped on the steering head as shown in the illustration. The engine serial number 2 Is stamped ...

DTC “c15” (p0115-h/l): ect sensor circuit malfunction
Detected condition and possible cause Detected condition Possible cause C15 Output voltage is not with in the following range. 0.15 V ≤ Sensor voltage < 4.85 V Ect sensor circuit open or short.  Ect sensor malfunction.  Ec ...

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