Make a motorcycle yourself. That is not so difficult if you have the craftsmanship, the stuff and the time. Jan Eggink is such a person,
Based on a Yamaha XS2 frame with license plate, he built his special with a 'road use', former alcohol-fired Jawa speedway block. And we don't have to explain that such a project is challenging.
A changed frame
Of course the frame had to be adjusted to be able to hug the Jawa block. And of course a gearbox had to be found behind that Jawa block. That became one that once started its life in a Norton. The block had to learn to drink regular gasoline and the total loss lubrication system was converted to an oil-tight circulation system. For the primary transmission, a belt system was devised for which Jan put the 'gears' himself. The fact that the pivot point of the rear fork had to be adjusted was calculated.
All kinds of bastards and noble bastards
In the meantime we know Tritons, Tribsa's, Norvins, at least two Daprs and more bastards. And then there were - and are now again - demotors from the Koning Zelfbouw tradition as started again by Goos Bos from Motoport Hengelo. The Yamawa is completely appropriate in that context. Because - in all respect - the Tritons, Tribsas and the like are, in comparison to this type of bicycle, building kits rather than creations.
Strangely enough, the 'value' of self-built motorcycles is primarily emotional and owner-oriented. "The audience" is there and looks at it. But when it comes to sales, it appears that potential buyers have difficulty making the cut. This phenomenon is known from pleasure craft. There, lovingly adapted vessels have been difficult to sell for years. Simply because they have evolved too specifically to taste. For motorcycles it also counts that there are no Haynes Manuals for these types of machines and that there is little meaningful information on the Internet / youtube. The buyer of such a motorcycle must simply have more than basic technical knowledge.
Never finished, never finished
It turns out that these types of machines, if they already find a new owner, often evolve further. Such a machine can simply grow with its owner. And if a motorcycle has become completely 'your' motorcycle, then any market value is no longer important. Because you don't want to sell such a unique item, do you?