greg bender
http://www.thisoldtractor.com/gtbender
General specifications for VHB carburetors
This information was gleaned from eurocarb.

- Choke sizes: 20 mm, 22 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm
- Clamp-on fitting sizes: 35 mm, 31.75 mm, 28.57 mm
- Cable or lever operated independent choke system
- Square slide
- 29 mm and 30 mm models available with piston type accelerator pump system
- Independent idling circuit with adjustment on left or right
- Original equipment on:
- Aermacchi
- Benelli
- Beta
- Ducati
- Fantic
- Gilera
- Laverda
- M V
- Minarelli
- Moto Guzzi
- Moto Morini
- Vespa