As far as a frame, i was just going to build a high-speed bike frame, and suit it to a snowmobile engine, but will they really care what type of motor is in it? And as far as Munro entering his bike in current speed trials, i know that it wouldnt pass, seeing as it barely passed in the 60's. I'm not trying to build a replica of his bike, i was just giving an idea as to how it would be set up/how the rider would be positioned in the bike etc. Im not sure what class exactly. I really havent gotten that far yet. Does anybody know what class it would qualify for?