UPDATE: Rustin wrote in with some build info. That’s an impressive engine!.
1976 Honda cb550k. The cylinders are bored out to fit cb750 pistons. Making the displacement 592. The cam is from a cb650. Dyna s ignition and coils. The exhaust is stainless replica of the yoshi exhaust. Dyno tuned at Twinline motorcycles in Seattle WA.
Rustin Olson sends in this nice rider.
I built this myself in my garage. Took sometime but I’m very pleased with the out come of my first build. If so I can send high res pictures.