Mechanism
Via metal cables, the throttle grip operates a roller mounted on one end of a spindle located near the horizontal cylinder throttle valve spindle.
The aps sensor, which measures the position of the throttle grip itself, is mounted on the opposite end of this spindle.
A mechanical stop on the roller limits throttle valve travel via a special system of levers.
Normal ride-by-wire system function
The throttle valves rotate through an arc ranging from completely closed (mechanical end-stop) and the aperture set by the throttle valve, which is determined by the ecu from the information received from the aps sensor, and delimited by the stop position on the roller, but without actually reaching the stop position itself.
The stop on the roller does not therefore mechanically delimit the travel of the throttle valves when the throttle grip is completely released (idle speed condition), there is an angle of approximately 5 between the stop on the roller and the mechanical end-stop of the throttle valves. The throttle valves rotate within this angle to automatically regulate idle speed (target idle speed is 1350 rpm with the engine stabilised at operating temperature)
Ride-by-wire system function in the event of a fault
In the event of a fault of any of the components of the ride-by-wire system, whether electrical or mechanical, the ecu cuts off power to the electric motor normally actuating the throttle valves.
A spring gradually closes the throttle valves against the mechanical end-stop.
If the throttle grip is also closed during this stage, the stop on the roller connected to the throttle grip via metal cables, closes the horizontal cylinder throttle valve with a system of levers.
As the horizontal cylinder throttle valve is connected to the vertical cylinder throttle valve by a link rod, this also closes the vertical cylinder throttle valve.
It is impossible for the throttle to remain stuck open as a result of a ride-by-wire system fault.
Warning
Upon ride-by-wire activation through dds, the twistgrip must be completely turned so that the electric actuator can activate the throttles (their movement is not obstacled by the mechanical stop on the pulley which is connected with the twistgrip, through the metallic flexible wires).
A mechanical stop connected to roller (rotates together with roller), b tang connected to throttle valves (rotates with throttle valves), c roller operated by cables connected to throttle grip, d roller and throttle valve return spring.
The following is visible in the photo:
In this case (ride-by-wire is working), the mechanical stop (a), driven by the rotation of the twistgrip, is not resting against the tooth (b).
The following is visible in the photo:
In this case (ride-by-wire system malfunctioning), the mechanical stop a, driven by the rotation of the throttle grip as the rider closes the grip itself, is in contact with the tang b, which forces the throttle valves closed.
Airbox - throttle body
Airbox
O-ring
Injector
Throttle body assembly
Screw
Clamp
Intake manifold
Screw
Pressure sensor
Screw
Clamp
Hose
Sealing washer
Intake manifold
Sealing washer
Screw
Screw
Spacer
Bracket
Rubber pad
Clamp
Hose
Clamp
Union
Washer
Hose
Cable gro ...
Removal of the evaporative emissions canister
Loosen the screws (9) securing the plate (8) to the tank.
Slightly pull the plate (8) with the canister (13), remove the clamps (3) and
(12) and connect hoses (7) and (14).
Release the retainers (b) of the plate (8) to remove it from the canister
(13).
Disconnect the hose ...
Removing of the abs control unit
Drain the hydraulic fluid that is inside the front and rear braking system
tubes by disconnecting them from the master
cylinder and the calliper (sect. 4 -3, Changing the brake fluid).
Disconnect the connector (a) of the abs control unit (6).
Loosen the screws (16) that retain the abs ...