I am building a 75 xs650 bobber. I have installed an xs charge generator III ignition, an xs charge pma with a capacitor. I could not get the bike to start because it had no spark. After checking everything I replaced the capacitor with a battery and it started right up. I checked to see if it was charging and it wasn't. I checked the stator while it was running and I get 17 ac volts so that was good and had a friend put my capacitor on his bike bike and it worked fine also. So I broke down and bought a new reg/rec from TC bros which i installed and everything worked as it should for a few test starts then it quit working also. Looking for advice as what to do next. Thank you