Always wondered about doing something along these lines. The one Clarkson was riding on stage was powered by something similar to this http://alshobbies.com/shop/cat.php?id=370
they are used to power remote control model jets. You can also get some pretty beefy electric motors designed for the Remote control plane market, anything up to say 5kw or more, and they would probably be pretty easy to mount to a bike, not cheap though :( unless of course you go the cheapy Chinese copy way like this bad boy http://www.hobbyking.com/hobbyking/store/%5F%5F14427%5F%5FTurnigy%5FCA120%5F70%5FBrushless%5FOutrunner%5F100cc%5Feq%5F.html
equivalent power of a 100cc IC engine if set up correctly.
Always wondered about doing something along these lines. The one Clarkson was riding on stage was powered by something similar to this http://alshobbies.com/shop/cat.php?id=370
they are used to power remote control model jets. You can also get some pretty beefy electric motors designed for the Remote control plane market, anything up to say 5kw or more, and they would probably be pretty easy to mount to a bike, not cheap though :( unless of course you go the cheapy Chinese copy way like this bad boy http://www.hobbyking.com/hobbyking/store/%5F%5F14427%5F%5FTurnigy%5FCA120%5F70%5FBrushless%5FOutrunner%5F100cc%5Feq%5F.html
equivalent power of a 100cc IC engine if set up correctly.