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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 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:

Gearshift shaft / gearshift cam plate removal and installation
Removal Remove the engine sprocket cover. Refer to “engine sprocket removal and installation” in section 3a .  Remove the clutch components. Refer to “clutch removal” in section 5c .  Remove the snap ring (1) and washer (2) from the gearshift shaft. Special tool : 09900–06 ...

Tightening torque specifications
Note the specified tightening torque is described in the following. “Throttle cable routing diagram”  “throttle body components”  “throttle body construction”  “engine assembly installation” Reference: for the tightening torque of fastener not specified i ...

Gearshift linkage inspection
Refer to “gearshift shaft / gearshift cam plate removal and installation” . Gearshift shaft Check the gearshift shaft for bend or wear. Check the return spring for damage or fatigue. If any defects are found, replace the defective part(-s). Gearshift shaft oil seal Inspect the gearshif ...

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