Vintage motorcycle on a budget

I had a visitor the other day. He is a very clever chap. If it might work, or fit, he makes it happen just the way he wants it. The end result is a motorcycle with a vintage look but made from parts manufactured through the ages. He even fabricated his own girder forks!

I know it’s not for the purists but this bike represents the spirit of vintage motorcycling.

Have a look at the image and see if you recognise anything. I’ll start you off. The JAP engine is from a rotorvator.