This bike was (is) one of the best bikes ever built.
It was designed and built to very high standards of engineering and quality.
Everything that shines on the bike is stainless steel, and it has monoshock rear suspension!!
It had the nickname 'Plumbers Nightmare' because of all the external tubing used for the fluids.
It was designed by Phil Irving, a very tallented engineer who was ahead of his time. He wrote the legendary book 'Tuning for Speed' which is still very relevant and eye opening.
Phil Vincent hired him to design an engine to fit on his bikes which were using engines from other manufacturers until then.
It was conceived when he combined the designs of two Vincent Meteor, Comet engines (single cylinder 500), and realised he could make a Vtwin 1000. The Black Shadow was not just the 'Hayabusa' of its time, it was much more than that.
There are quite a few bikes with similar specs to the Hayabusa, or any 'Busa' nowadays. Back then there was nothing even coming close to the Black Shadow, and the cost of owning it was 3 times that of the second best bike of the time, which would be something like a 650 Triumph or Norton .
The Vincent was produced in various stages of tune and equipment:
Vincent Black Shadow,
Vincent Black Lightning,
Vincent Black Prince with full fairing, touring version and ugly IMHO.
These bikes are very expensive and very collectable, the owners are organised in the a group and pay tribute to Phil Vincent every year at the cemetary where he is burried.
I hope I was able to fiil in a few gaps about the one of the best motorcycles ever built.
You can see more info here http://www.tower.org/museum/vincent/vincent.html