W1 from the 1960s, which was based on the BSA A7 of the time. I think it's
quite a good effort as 'retro' goes too. Doesn't make quite as much racket
as a 1960s bike, but has about the same power, and it has a disc brake and
modern electrics, so it stops and starts better than an old British machine.
It's a parallel twin of 675cc. Note the shaft-driven camshaft instead of
the more usual chain (or pushrods in the 1960s).
This engine couldn't meet Euro emissions law with carburrettors, so they
stopped importing it to the UK in 2006.
New W800 which replaced it has fuel injection, but is mostly the same bike.
They removed the kickstart though, which seems a shame. I rather enjoy
firing mine up by foot alone, with the electric starter as backup if things don't
go well... usually it fires on two kicks, and probably would on just one if I were
built like a 1960s biker and didn't have a dodgy hillwalker's knee...
