Some people do not recognize the differenece between a set of Springer forks and a set of Girder forks.
To in very simple terms:
Springer forks, often used on older Harley motorcycles, have 2 sets of legs on either side. The rear set should not move, and the front set moves up and down with the road surface. The Springer forks pivot on the small rockers on the bottom and use a series of springs at the top for suspension.
Girder forks, often used on Indians and some aftermarket choppers, use one set of fork legs that move up and down with the road surface and use a set of parrallel arms and springs at the top by the steering head for suspension.
Anyone out there with a better description - please chime in.