The best engine in the world is the 'vagina'. It can be started with one finger. Its self-lubricating. It takes any size piston. Changes its own oil every four weeks. It is only a pity that the management system is so f**king tempermental.
Could try Mick Abbey in Teesside, made these, cans are from Norbo, but Mick is making his own now.
They look the part. I'm in Kent if they need the bike its a bit of a mission to take/collect bike. Looks like made to measure is the best option. I will be using standard footrest holders/exh mounts just spaced out 10/15mm, I wonder if anyone could make a set with out having the bike? Ta Nij