Bob Geldart's Vintage Honda Racer

Bob Geldart is a motorcycle master with an eye for buiding beautiful vintage racing motorcycles. He rebuilt this vintage custom Honda racer for his wife. In the video below, Bob walks through the major customizations. Unfortunately, I didn't ask Bob what frame and engine he converted!! Any ideas?

[cid=9182,http://i3.ytimg.com/vi/B0f0rzig3xY/hqdefault.jpg]

For more, here's Bob's Triton 650cc which, by the way is street legal and used as his commuter motorbike.