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Suzuki GSX-R 1000 Service Manual: 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 actuator motor. The position sensor (incorporated in the excva) detects the excva movement by measuring the voltage and then the ecm determines the excv opening angle based on the engine rpm and gear positions. Every time the ignition switch is turned on, the excva automatically drives the excv and detects full close/open position voltages and sets the excv to middle position.

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Suzuki GSX-R. Full close


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Suzuki GSX-R. Full open


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 ex ...

Repair instructions
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Other materials:

Stp sensor removal and installation
Removal Remove the throttle body. Refer to “throttle body removal and installation” in section 1d (page 1d- 10).  Remove the stp sensor (1) with the special tool. Special tool : 09930–11950 (torx wrench (5 mm)) Note prior to disassembly, mark the stp sensor’s origina ...

Rear wheel dust seal / bearing removal and installation
Removal Remove the rear wheel assembly. Refer to “rear wheel assembly removal and installation” .  Remove the rear sprocket mounting drum assembly (1) from the rear wheel. Remove the wheel dampers (2). Remove the dust seal. Special tool (a): 09913–50121 (oil s ...

Special tools and equipment
Recommended service material Note required service material is also described in the following. “Rear brake components” Special tool ...

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