- Choke : Ø 20 ? 22 ? 24 ? 25 ? 26
- 2 - 4 stroke
- Piston-type throttle valve
- Independent starting circuit
- Idling system with jet and mixture adjusting screw
- Main circuit with mechanical mixture adjustment by mean of a conical needle
- Versions of mixture adjusting screw on the right and/or the left
- Versions with mechanically-operated diaphragm acceleration pump
- Sleeve connection with insulating reducing socket from Ø 31,75 to Ø 28,57 and Ø 31 elastic fitting connection
- Air intake connection Ø 38 or Ø M38 x 1,25 for trumpet or union assembly

- Choke : Ø 26 ? 28 ? 30
- 2 - 4 stroke
- Piston-type throttle valve
- Independent starting circuit
- Idling system with jet and mixture adjusting screw or air adjusting screw
- Main circuit with mechanical mixture adjustment by means of conical needle
- Versions with idle adjusting screw on the left and/or on the right
- Bowl with the possibility to assemble independent floats
- Versions with piston acceleration pump or mechanically-operated diaphragm acceleration pump
- Versions with power jet
- Sleeve connection with insulating reducing socket from Ø 40 to Ø 35 and Ø 36 elastic fitting connection
- Air intake connection Ø 42 or Ø M 42 x 1,25 for trumpet or union assembly