Bravo!

Not sure how the purists will respond but I enjoy a wide range of vehicles and while restorations have their rewards and the moral and socially responsible thing to do in certain applications,,.
(I rescued my 59 Bonnie, and 66 T120C from a life as choppers)
Not everything has to be grey porridge.
I ran a shop for a while doing vintage cars and bikes and while there was a steady stream of restorations, What paid the bills by 2/3rds were the custom stuff. I tried to be ethical about what got the custom treatment and what did not, But to many locals I am STILL that F##k'n chopper guy.
(You date a sheep just once as a favor to a friend, and forever after you are known as that SheepF******)
I have what might or might not be a Triumph quadrant basket case, story behind that.
I also have a number of friends over the years who have built fun hybrids like what you are doing.
SirEddy had Horton- Hotrodded CB750Sohc4 in a 750 Commando rolling chassis
Doc Harms built ALL kinds of crazy stuff, many with BSA origins my favorite was the Suzuki Savage mtr in a BSA M20 chassis
Mark married a BSA A65 with a Yammie XS650 which is not much a stretch, And there is a fellow in Alaska with a MuchLess that is a Japanese bike with some Matchless bits. A few others but you get the point.
I have never heard of this motor, but it caught my eye as I kind of like some Kwakker bikes and had a few, currently have 2 KZ750Bs which is an Aircooled 750 twin and while not very fast, and a bit UJM, its enough metrified BSA twin I like them. They only made them 2 years and the UK mag "Classic Bike" says they are a
"Future classic collectible" so that helps my self esteem.
But this motor seems very interesting with a 500 twin w/ alleged 50 hp?
See:
https://en.wikipedia.org/wiki/Kawasaki_ER-5Being liquid cooled will be interesting how you address that.
Also fun to see what you do for wiring, electrics and adapting and mixing & matching bits as you already are doing with the forks & wheels.
My only advice/opinion is that you will benefit from ditching those carbs and getting something NON CV like a VM Mikuni is a popular choice with the XS650 crowd, or the JRC/PKW flat slide Keihen types.
(or just for fun some Amal Monoblocs?)
Thumbs up!
