re: 60 MPH...achieveable? Who cares?!? Let blueprint an engine!
Did you see that movie "Worlds Fastest Indian"? I think thats the name. Aerodynamics was the key to his speed. That, and nitromethane. With five horsepower, low rolling resistance, and a low drag coeffiecient, 60 is no big deal with a mildly modified HT. All the money will be spent on the chassis, in my opinion. However, getting to 60 mph in only a quarter mile from a dead stop really will be a feat, if the bike is single-speed. Anyone thinking CVT?