greg bender
http://www.thisoldtractor.com/gtbender
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 "P" clamp from NAPA attached to the lower right bellhousing bolt instead.