Here are 3 K0's from my collection. The blue-green bike is shown on Lester mags but it's back on wire wheels now. Red is the first 750 sold at our local shop, it's a Sandcast.
The Sandcast is mostly original, it has repainted Honda side covers and a Yamiya exhaust, The gold bike is named the nugget, when purchased, it was brown and looked like a different kind of nugget, it's very original except a 341 exhaust and a tin set done by Vic Worlds painter. Gold wrinkle tank though. The blue green bike is a total restore with a Yamiya exhaust and a newer engine. I'm always watching for an engine in the 14,000 range.