The Iron Girl 1994 one on netflix

A good looking young girl named Susan is out roller blading when a biker gang rape her. She aims to seek revenge and uses the aid of a karate teacher and a bike trainer to give her the confidence she needs to avenge her attackers. As she learns karate she becomes a biker herself and changes her name to Ginger. Only to her friends she is Susan but to all the bikers she is the Iron girl Ginger. She uses her courage to track down that Biker gang and now she is out to get even with them.