Just to have fun.
Having access to tools.
Grafting a Hossack style front end onto an old UJM motorcycle – a lot of people have never even seen or heard of the design. Its not a girder fork – in fact, the stock head tube no longer carries any weight.
I leaned to do machining on a Bridgeport after starting this bike, and ended up with some pretty nice parts, like the upper control arm bridge.
Plus the fact that it actually works really well in traffic, and can handle some serious abuse.
If they are gonna talk to me, they usually want to know how the front end works, what the engine is.