Classic 1978 Kawasaki 250 B3.

The KAWASAKI KH250, 1976.

New legislation meant that the engine had been detuned again and this resulted in a top speed of little more than 80 mph, even though it felt a lot faster, but it is not all about speed these days.
I would say the word nostalgia is more fitting as the last surviving triple, the KH250 gradually fell by the wayside.

The KH ran through B1, B2 and B3 versions before it's final demise, so in a way, it's nice to see a green meanie that's been restored and captured in time like this stunning example below.