Hi there Peter, I thought that might be the case.........seems a shame to dismember another bike, unless it was in bits already. We are a bit luckier here in Australia as we can still get away with building something with a new frame, so long as it has some form of numbers on it. I feel it is a much better proposition to build a Norvin using a "chopped" engine. with the complete engine you have to move the engine as far back as you can, and keep it as low as possible. The right rear down tube next to the swing arm pivot needs to have a flattened area on the inside to give the drive chain some room, and your choice of carburetors is limited unless you want to start removing fins off the rear barrel/head............ I am currently building one with a new replica Wideline frame, using a brand new engine, 1200 cc, electric start and so on..........We are using a pair of Mk 1 Concentric's with special stainless manifolds, and I have flattened a section of the top left tube of the frame to give the carby some room on the inner side of the tube. I do not heat and bash the tube in, I cut a section out and flat sheet weld a new piece in to keep it very neat. I made my own mounting brackets welded to the lower forward frame, and some nice billet alloy engine plates much smaller than the usual ones. The hard stuff is all done now, just need to paint the engine, assemble same and install it hopefully for the last time. I'll make up the rear engine plates latter, as these also form the footrest and exhaust mounts as well.