So how hard is it to find a 98 super rat 100 motor?

I was hoping to race the MT vintage 100 class. The "WORKS" class looked like it was too expensive. Titanium and carbon fiber high dollar bikes. I live up in Sacramento. I thought I would try a couple MT races and maybe some of the AHRMA races. So if that class is slowing down I should prob...

Hello, I am trying to build a bike for the Marty Tripes Vintage 100 class in S Cal. I would like to use a Hodaka 100 motor. Are all the 100 motors the same or is there a year that would work better for vintage mx racing? Ate the motor mounts the same on all the motors? Could you use a 125 motor and ...