I've always been fascinated by the "Britten" motorcycle and have been lucky enough to check a few of them out when I've been to New Zealand.
One located in the Wellington Museum and the others were at "Classic Motorcycle Mecca" in Invercargill.
Anyhow, the actual reason for this post was that I came across this YouTube video on John Britten and his amazing bikes...
Enjoy!
https://youtu.be/w3VQB7dTFoM