Greggo, you know we will help cheer you on spending your money.
There is a pretty extensive collection of tank variants on the BMW airhead bikes and "jim's Beemer" webpage has a nice page after page of photos of typically tanks on and off the the bikes. I am wondering if this is a metal or fiberglass tank upon looking closer again as many of the /5 tanks had a toolbox built into the top of the tank. These oversized 10-11 gallon Heinrich tanks were impossible to lift when filled and they typically covered the front of the seat which would prevent access under the seat where the tools were normally. The tank on this bike is not common and is much bigger than the black one you show above.
Being an all white refridgerator it is tough to really like the fairing and tank as it is pretty beat up and dull/dirty.
that upper fairing design is similar to the duc 700/900 fairing Paulages has on his hybrid build (former BOM bike).
Redone in a nice paintjob you might like the fairing, if not you'll just have to ship the bike and fairing to me...
Better yet, I'll drive over and pick it up.
So, what is going to happen with your world domination quest in acquiring Pop Yoshimuri parts if your bike budget is split between BMW and Honda?