There's a small company in South Wales that will take a donor Yamaha Diversion 400(air/oil cooled) and turn it into a replica of an early Honda 400/4 race bike. Bespoke handmade bodywork, tank and exhausts, lovely looking thing and IIRC not nearly as expensive as you'd think
I'll try and find some pics.
Cool, I was going to buy old 1970 something Honda CB750 Four having in mind converting it to a cafe racer but ended up with Ducati Monster But, I have some secret plans to convert it into italian cafe racer if only I stop spending all my money on retrobikes :roll:
Will try to put some visuals tomorrow.