My no. 2 is a 1968 BSA B44 - 440cc unit single. It was originally exported new to the US, somebody brought it back home and rebuilt it some years ago. It had been crashed and evidently left in storage for a very long time, though the crash damage was not serious the rebuilder sadly was not a very good mechanic! So it's pretty clattery-rattly, but great fun to ride just the same. When I get rich I'll have it rebuilt again by someone competent.....