Hi good day. Maybe you could help me out here bro. These is the case.I have a 4pin Rectifier/Regulator for Honda CBR150. I have a problem about the regulating part, the voltage reading is quite changing rapidly depending on the Idle/RPM. i tested the battery(engine was off) it producing not less than or higher than 12.3v but from the moment i get the engine running the voltage reading is rapidly going up depending on the rpm it goes about more than 17.9v rpm is 7500 to 8000. I have installed a new Rectifier/Regulator but it didn't change. What do you think the problem was