For guys who like horsepower, you really can't have too much (well, you really can but we like to think not!). I remember riding the KX500 which was geared to top out at around 105 mph yet would lift the front wheel in fifth gear, at speed. Great fun until it hurt me. Now that I'm a little older, the risk might outweigh the fun.
The XR 650L was one which was a fairly good attempt at a street legal big dirt bike. GD
