Aprilia SR50R - Service manual > Injection Unit

INJECTION SYSTEM DIAGRAM IE50

Key:

1. Fuel tank
2. Fuel pump
3. Oil reservoir
4. Oil pump
5. ECU
6. Coil
7. Air intake
8. Air compressor
9. Throttle body
10. Pressure regulator
11. Fuel injector
12. Direct injector

REMOVING THE THROTTLE BODY IE361 IE50

• Loosen the clamp and remove the throttle body intake manifold from the air box end.

• Disconnect the connector.

• Loosen the clamp.

• Remove the throttle body from the right side of the vehicle, keep it attached to the throttle cable.

CAUTION If the throttle body is to be completely removed, disconnect it from the throttle cable.

REMOVING THE INJECTION UNIT IE361 IE50

• Move the fuel tank aside, keep it connected to the seat release cable and to fuel pump wiring, see (REMOVING THE FUEL TANK).
• Disconnect the fuel injector connector.

• Disconnect the compressed air inlet line.

• Loosen and remove the two screws.
• Remove the injection unit.

Carburetor

CARBURETOR DIAGRAM C364

Key:

1. Throttle valve cover
2. Throttle valve spring
3. Maximum jet 53
4. Minimum jet 32
5. Complete float chamber
6. Float chamber drain screw
7. Throttle valve
8. Choke
9. Tapered needle
10. Fuel closing pin
11. Float chamber bleed line
12. Screw
13. Throttle valve adjuster
14. Float chamber securing screw
15. Screw
16. Ring
17. Complete float
18. Tapered needle housing
19. Air screw
20. Float pin
21. Idle speed air screw spring
22. Throttle valve adjuster spring
23. Plate

REMOVING THE CARBURETOR C 364

• Loosen and remove the two screws.

• Loosen and remove the screw.

• Loosen the carburetor clamp.

• Remove the air box.

• Disconnect the automatic choke connector.

• Pinch the two heater hoses.
• Remove the two clamps and remove the hoses.

• Pinch the fuel hose.
• Remove the tie and disconnect the fuel hose.

• Pinch the oil hose.
• Remove the tie and disconnect the oil hose.

• Remove the tie and disconnect the vacuum hose.

• Loosen the tie and remove the carburetor from the intake manifold.

• Loosen and remove the screw and remove the throttle cable with gate.

See also: