This motorcycle is something like the hybrid daughter of several recognized parents, because on the one hand there is the engine of a Yamaha XT 500, at the other end we find a chassis signed with the name of the champion Kenny roberts, and finally we trip over the fibers of a Yamaha tz from the seventies. The result I think is quite beautiful and interesting. Its creator is Jean-Francois Vicente a passionate motorcycle maker who was instilled with the motorcycle bug by his father when he was still a child.
Since then it seems that his work has been dominated by a phrase that sums up very well how one of these motorcycles has to be made that mixes different components with such success.
Starting from the base of a motorcycle acquired through a classified ad in the USA, Jean-Francois got down to work with the idea of recreating a Yamaha TZ or Yamaha TD3 from the seventies. A few months later and a few spare parts later he got what we see. Some details like the brakes are signed by Grimeca or Brembo. The tank, the seat and the front fender are made of carbon fiber and coupled to the Kenny Roberts chassis of the original bike.
To finish the job we can see that Jean-Francois has been working on the intake with different options and carburetor-manifold settings, to finally decide on the shorter version of the manifold. The cylinder head has also been retouched by adding a second spark plug that I imagine will improve combustion performance on that 87mm bore piston. Although this is not clear to me if it has been done to the current owner or the previous one. Anyway, the end result has that factory-built racing bike look that the owner was looking for.