Norton 650 Unified Twin

Here’s something you don’t see every day.  Norton’s 650 unit construction twin, a bike which never went into production.  My good friend Anthony Curzon owns two of these, the one pictured above having just been assembled, utilizing the Matchless frame.   Anthony’s other machine uses a Norton slimline featherbed frame and I had the pleasure of taking it for a spin around the South London suburb of Croydon a few years ago.  The motor revs very freely and is remarkably smooth.  The head resembles that of an A10 and, as with BSA twins, the camshaft is to the rear of the crankcases.