Those are actually two different bikes -
Number one bike (black frame) was built around 1977 as a project to keep me sane while serving a six month driving ban incurred due to an excess of youthful exuberance on my Kawasaki S3 400 triple.
It was an original `footrests on the swingarm` model bought cheaply from a local dealership as a non runner - a good investment as it only took me around 30 minutes to find and fix the short in the wiring loom!
The engine had a Yoshi 460 piston kit and race cam, head ported by John Milligan (he`s long gone now, does anyone on here remember the eccentric Manxman who used to run the BFRC...?), Piper exhaust and Lucas RITA ignition, the alloy tank was by Mead Speed, seat home made by grafting a lump of chemical foam onto a stock seat pan, carving it to a shape based roughly on 7R/G50 lines, skinning with GRP and upholstering, I can`t remember now who made the ugly rearset kit.
In its final version it had twin front discs with lugs welded on the right fork leg to take another set of stock brake parts.
Well spotted that man on the Dresda swingarm and S&W shocks, those star shaped wheels were Japanese Daytona brand - if you fancy a pair you can now buy them again as production has recently been restarted in conjunction with Webike Japan to celebrate the 50th anniversary of their introduction in 1972...

I sold that one in 1979 when I bought my first brand new bike, a bright red Kawasaki Z500, but hung on to the tank and seat for future reference.
Number two bike was built around 1982, similar engine spec but without the race cam, Lumenition instead of RITA and the Yoshi `spaghetti` exhaust system.
The chassis was a triumph of what Cook Neilson and Kevin Cameron used to call `parts bin engineering` - the front forks and reverse Comstar rear wheel were CB400N, discs and calipers from a CX500, front wheel was CM250T (18" instead of the Superdream`s 19"), the front mudguard came off a CB250RS and it all bolted together without a single modification or custom spacer.
The lay down rear shocks were just a way of getting more suppleness and rear wheel travel and followed the then current trend on pre-monoshock GP bikes. The half fairing was a Norvil Commando replica if I remember rightly.
I`m beyond the `three score and ten` mark now but still haven`t cured myself of these Cafe Racer tendencies - this is the NC30 that I`m currently working on...

Rick