A20 Petcock

A20. 12x1 female spigot left medium shaft

 

 A20 12×1 spigot left, medium shaft, price $20
229169 ←reserve  on↓ off→ Taiwan-made by FS 401601
Photos:  1995 Tomos Targa original, 1998 Tomos Targa original, 2005 Tomos ST original
can use A20a with a longer fuel hose

 

A20a 12×1 spigot down, medium shaft, price $15
3174 ←reserve  on↓ off→ Italy-made by Franconi

 

A20b 12×1 spigot right, short shaft, price $35
01Z2691051-modified ←reserve  on↓ off→ Italy-made by OMG
Photos: 
1978 Moto Guzzi Robin original, 1979 Benelli G2 original

Benelli G2 The valve shaft sticks out of a small hole in the plastic side cover. To get the shaft through the hole in the plastic side cover, the black handle knob must be pried off and the metal rod unscrewed. The valve must be aimed just right. It might take 2 or 3 guesses to get the shaft aimed at the hole. Then the plastic cover is replaced, and then the handle knob is pressed back onto the shaft.