1969 Triumph TR6R (650cc). Fitted with E3134 cams, a gas flowed head and various bits to make it better - primary belt drive and electronic ignition for example.

It was a Bonneville for a while (splayed head with twin carbs) but I turned it back to a single carb motor because it's smoother, easier to keep in tune, and any peformance advantage with twin carbs is negligible.

Not been on the road for quite a while now.  A minor electrical problem (ah ha - Lucas, The Prince of Darkness strikes again!) has halted play for a while.