APRILIA RSV4 RR Service Station Manual page 404

Power supply
Variable geometry intake
To access the variable geometry intake system,
remove the air filter box cover.
The system consists of: two intake ducts for each
manifold, which may be joined (short ducts) or
separated (long ducts)
Electric motor
This is a DC motor actuating the upper portion of
the intake ducts through an endless circuit.
CAUTION
TAKE PARTICULAR CARE DURING REASSEMBLY. THE
POSITIVE SIDE (1) OF THE CONNECTOR MUST MATCH
WITH THE SIDE WHERE A NOTCH (2) IS INDICATED.
a variable geometry control unit for managing the
system, interfaced with the engine injection control
unit
Operation
At key-ON, the variable geometry control unit lowers the ducts (if still in the raised position).
Subsequently, depending on the control voltage on PIN 2 from the injection ECU (0V down, 5V up), the
ECU drives the electric motor with the relative polarity for raising or lowering the ducts.
P SUPP - 404
RSV4 RR/RF