Peugeot Speedfight - Workshop Manual > Fuel System

Removal of the fuel pump

• Remove the storage compartment. See: Procedure 1.
• Clamp the end of the fuel inlet pipe using a clip ref. 755996 (1).
• Disconnect the 2 fuel pipes (1).
• Disconnect the vacuum hose (2).
• Remove the fuel pump (1 screw).

Removal of the carburettor

• Remove the storage compartment. See: Procedure 1.
• Remove the lower fairing by sliding it towards the rear of the vehicle (1 screw).
• Disconnect:
  • The throttle control (1).
  • The fuel inlet pipe (2).
• Disconnect:
  • The carburettor heating resistor (3).
  • The choke (4).
• Remove the carburettor (2 Collars).

Removal of the throttle valve

• Remove the chamber cap (2 screw).
• Remove the spring.
• Remove the needle, valve and membrane assembly.

• Remove the needle stop (2).
• Remove the spring (3).
• Remove the needle (4).

  Check that the membrane is in good condition.

The height oif the needle is factory set and cannot be modified.

Removal of the float, needle valve and jets

• Remove the chamber (4 screw).
• Remove the float chamber and its O-ring.

  Check the condition of the float chamber O-ring.

• Loosen the float pin clamping screw (2).
• Remove the float (3), its pin (4) and the needle valve (5).

• Remove the idle jet (6).
• Remove the main jet (7).
• Remove the needle well (8).

Check the condition of the needle valve and the needle valve seat (A).

Check the condition of the float chamber O-ring.

Removal of the mixture screw

• Turn clockwise the mixture control screw (1) while counting the number of turns until it is screwed home.

When re-fitting, this operation allows you to put it back to its initial adjustment position.

Removal of the pick-up pump

• Remove the 2 screws from the sheathing holder plate.
• Remove the bushing (1) and the protective rubber (2).

Check the condition of the bushing and the rubber protection.

• Remove the piston (3).

Removal of the pick-up pump suction valve

• Remove the jet.
• Remove the spring.
• Remove the ball.

Removal of the deceleration enrichment device

• Remove the 2 bolts that secure the cover.
• Remove the cover.
• Remove the spring.
• Remove the membrane.
• Remove the O ring.

Check that the membrane is in good condition.

Check the condition of the O-ring.

Removal of the carburetor heater

• Remove the carburator warming resistor (1).
• Remove the heater earthing connection (2).

• Clean the carburettor body with Biosane cleanser ref. 754748 or use an ultrasonic cleaning tank.
• Blow into every jet and duct of the carburettor body with compressed air.

Do not use any metal tool which can damage the ducts of these items.

• Re-install all the other components and, if necessary, when starting the engine, readjust according to the values indicated on the technical data card.

The carburettor and its components

1. Choke.
2. Piston.
3. Sump.
4. Float.
5. Jets.
6. Needle valve.
7. Mixture screw.
8. Pick-up pump.
9. Idle screw.
10. Pick-up pump suction valve.
11. Deceleration enrichment device.
12. Carburetor heater.

Power Unit

Removal of the power unit

Note: To remove the cylinder head, remove the power propulsion unit.

For removal of the cylinder head, cylinder and piston, see the workshop manual: 2-valve, 50cc 4-stroke engine.

• Remove the storage compartment. See: Procedure 1.
• Remove the lower fairing by sliding it towards the rear of the vehicle (1 screw).
• Disconnect:
  • The magneto (1).
  • The starter motor (1).
  • The choke (1).
  • The suppressor (2).
  • The carburettor heater (3).
• Disconnect:
  • The throttle control (4).
  • The fuel inlet pipe (5).
  • The vacuum pressure hose (6) (Pulsair).
  • The vacuum pressure hose (7) (Fuel pump).
  • The pulsair reed valve hose (8).
  • The rear brake control cable.

• Suspend the rear of the machine
• Remove the shock absorber upper mount (9).

Tightening torque: 45 Nm.

When re-installing, use a new nut.

• Remove the linkrod-to-engine connecting pin (10).

Tightening torque: 60 Nm.

When re-installing, use a new nut.

• Remove the power propulsion unit from the frame.
• Remove the covers from the power unit.

 

See also: