just buy the bike... or build a formula SAE car...
this car is hardly going to be a street car anyway, so why bother keeping it a car at all
doesn't make sense at all to me, if a motor is designed to push 200kg why would you put it in something that will weigh 600-1000kg (weights including rider/driver)
surely it would for one; be a pig to drive and for two; as mentioned the engine will not last
the other side of the coin.... say you are aiming for the ideal 50/50 weight split or slightly heavier in the front 52/48... dropping all the weight out of the front end is going to push you into 45/55, heavier rear end... therefore potentially negating the handling benefits of loosing the weight?
surely the same people that understand that comparing maximum HP figures from a dyno means very little on a race track; arn't the same people being lured by high HP figures from motorbike engines designed for crotch rockets?