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.
Full close
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 ...
Other materials:
Procedure for returning
to service
Clean the entire motorcycle.
Remove the oily rags from the
air cleaner intake and muffler
outlet.
Drain all the engine oil. Install
a new oil filter and fill the
engine with fresh oil as outlined
in this manual.
Remove the spark plugs. Turn
the engine a few tim ...
Camshaft inspection
Refer to “engine top side disassembly” .
Refer to “engine top side assembly” .
Camshaft identification
The exhaust camshaft has the embossed letters “ex”
and the intake camshaft has the embossed letters “in”.
Cam wear
Check the camshaft for wear or damage.
Measure the cam height “a” w ...
Fuel injection system description
Gsx-r1000 motorcycles are equipped with a fuel injection system for emission
level control. This fuel injection system
is precision designed, manufactured and adjusted to comply with the applicable
emission limits. With varying engine
conditions, all of the fuel injection volumes are precisely ...