Test the output from the stator. Start with a ohms test of stator, then voltage output. If stator is good then test at battery. If R/R is bad I suggest going with a Series type, not a shunt type. Both are MOSFET, the series type limits the output of stator. Shunt types ground excess voltage, so the stator is producing full power and heat 100% of the time. Google it and see that HD, and most sport bikes have went to this mod to fix a weak and unreliable stator. Look up Compufire series regulators. Really is a fix for our stator.