Can you just unbolt a WR400 lighting stator and bold on one from a WR426 or 250? I am wondering how to do the upgrade from 80watts to 130 watts, but are they compatable. Is the ignition part of the same unit too? I know on my old KX you had to be careful to make sure the ignition was the same before changing stuff out, but I don't know how the WR is set up. (haven't had a reason to tear it apart... yet).