Breather box - hose sizes
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
- Inlet hose (right side): ID = 18 mm (~ 11⁄16 inch); Length = 60 mm (~ 2 3⁄8 inch)
- Return hose (middle): ID = 8 mm (~ 5⁄16 inch); Length = 60 mm (~ 2 3⁄8 inch)
- Atmosphere hose (left side):
ID = 14 mm (~ 9⁄16 inch); OD = 17 mm (~ 11⁄16 inch); Length = approximately 600 mm (~ 24 inch)
Thanks to K. Ross Raymond who posted the following information on the Yahoo! Loopframe_Guzzi news group.
It is somewhat difficult to source an atmosphere hose with the proper ID and OD that is also oil tolerant. Here is one source for such a hose: Pelican Parts part number N-020-371-1-M21.
Thanks to Charlie Mullendore of Antietam Classic Cycle for providing this alternative.
I bought a length of silicone rubber hose from McMaster-Carr. Kinda of a brownish-black color, slips right up onto the breather box snug, thin wall so should fit into the bracket no problem. I don't use the bracket, but a vinyl covered
Pclamp from NAPA attached to the lower right bell housing bolt instead.