Do they use irk, ork, or a regular stator? I ask this because I was on pitbikeclub's website and I asked this question. They said that I can put a 155cc stator on 125cc engine to give my bike better throttle response.
the installation is simple too, just need to solder 3? wires to the same colour that came off..
the outer rotor should be much better than your massive hunk of a flywheel