Ok so I got this bike and its aftermarket everything. The only numbers I could find are on the motor and it comes back as a 1988 evo. On an aftermarket softailish frame. The jackshaft jn the starter is worn and needs replaced. I want to put in a solid one. I just cant find anywhere that has a jackshaft for an 88. They go to 89 and that´s it. Did they call it something different before 89? What am I looking for and any suggestions on a place to order it. Thanks