- Wash and blow the flow screw.
- Check that the screw is free from deformation and/or oxida-
- Assemble the spring on the screw.
- Tighten the flow screw on the carburettor body.
- The final position of the screw must be defined by the exhaust
- Prepare the carburettor for adjustment with the screw loose-
ned by 2 turns from the closed position.
- Before proceeding to reassembly, carefully clean the car-
burettor body using fuel and compressed air.
- Be especially careful to the fuel inlet duct and the pin seat.
- For the maximum circuit, check the air calibration shown
in the figure.
- Carefully clean the air holes shown in the figure.
- For the minimum circuit, check the correct cleaning of the
following points: air calibration, outlet section controlled by
the flow screw, progression holes close to the throttle valve.
THE MINIMUM AIR IS CONTROLLED BY TWO CALIBRATIONS.
THAT OF THE CUT-OFF IS DIRECTLY OBTAINED IN THE CAR-
- For the starter circuit, carefully blow the nozzle connection
duct since the nozzle support hides further internal calibra-
tions that are not accessible.
- Carefully blow the pickup nozzle.
ITS OUTLET SECTION IS VERY SMALL AND FACES THE THRO-
TTLE VALVE. A WRONG ORIENTATION OF THE NOZZLE CAU-
SES A POOR SPRAYING.