This is a road legal old-fashioned Auto Race Triumph. It was built Tom at ForkCo - Sideburn's Japanese distributor. ForkCo make lovelyengine dress-up parts for Harleys, Triumphs and Yamaha XS models. They're available direct or through Lowbrow in the US of A.
I know, I know, but these are inspirational bikes.
They're from Hummingburger via Bubble Visor. G