APRILIA RSV4 RR 2017 Service Station Manual page 214

Electrical system
AFTER EACH MAINTENANCE OR CHECK OPERATION AT THE EXHAUST VALVE, PERFORM
THE "EXHAUST VALVE CABLES CLEARANCE ADJUSTMENT" PROCEDURE.
The system consists of a throttle valve with return spring on the exhaust. The valve is closed by means
of the two cables moved by an electric motor in its turn electrically connected to the instrument panel.
The logic and the motor control, however, reside in the Marelli injection control unit that dialogues with
the instrument panel via the CAN.
The motor consists of a potentiometer for controlling the position and a DC electric motor.
With the key set to ON, the valve self-cleaning is carried.
In the event of a malfunction (electric or mechanical) the valve could stay stuck in the closed position.
In the event of a CAN line malfunction the valve returns to the open position.
In the event of a check, removal or replacement of one or more system (cables, valve, motor) a cali-
bration procedure is required.
CAUTION
BEFORE CARRYING OUT THIS OPERATION, CHECK THAT THE BATTERY VOLTAGE IS HIGHER
THAN 12.5 V
CAUTION
WORK ON THE MOTOR OF THE EXHAUST THROTTLE VALVE ONLY WITH THE KEY SET TO
"OFF" OR ONLY AFTER DISCONNECTING THE NEGATIVE POLE OF THE BATTERY.
CAUTION
NEVER REMOVE THE PULLEY FROM THE MOTOR
CAUTION
LOOSEN THE ADJUSTER SCREWS OF THE CONTROL CABLES BEFORE REMOVING THEM, TO
PREVENT FORCING THEM.
CAUTION
BEFORE REMOVING THE CONTROL CABLES CHECK THAT THE MOTOR PULLEY IS IN THE
"ZERO" POSITION. NEVER WORK ON THE CONTROL CABLES IF THE MOTOR PULLEY IS NOT
IN THE "ZERO" POSITION
ELE SYS - 214
RSV4 RR-RF