Looking like the spoils from some brutal conflict, the gutted chassis of Russ Collins' infamous twin-engined, 600-horsepower drag bike "Sorcerer" is gathering dust in a loft overlooking R.C.

Harley-Davidson motorcycles are legendary for their style, sound, and presence. They dominate the highways, roaring with unmistakable authority. But when it comes to sheer speed, Harley isn’t the ...