Hanson supercharger corporation is a company that makes superchargers for small engine vehicles for go karts or can be used on just about anything that it is up to your imagination.
This HSC V-12 system, is a roots blower or supercharger,the blower can increas power by up to 50% on a smallengine.
more video of same bike.
hear is another example of some more superchargers this blower on this motorcycle ,this is a AISIN AMR300 Blower Derby City Customs in Louisville, Ky. built the motorcycle
blower with a holley carb on top ,with a K&N filter ,the gas take was split to make room for the blower set up.This on mean street machine, THE bike with the blower sounds like a V8.