The motor is a Polaris 800 cc or Rotax Bombardier, there are differents prototypes... look at "blue rage" on google, you'll find some nice information, maybee in german... The gear box is from a Ducati... (Thanks Google) Motorbike pictures without carburetors or injection... Write to Ivan Salamin for any information on the motorbike If somebody need information about the home made exhaust system write to Millet Racing Chemin des Fins 74 ANNECY tél : 0033 (0) 4 50 57 60 35 (France)