2 months ago I replaced the stator and regulator with aftermarket parts due to low voltage at battery. I also replaced the battery as it was 5 years old. I noticed while riding yesterday the clock time on display changed. After getting home bike wouldn't start. Showed 7.8 volts. Recharged the battery. Now12 8 volts. When at idle it stays at that reading. At 4000 rpm 13.2 volts. I figured it would be in the 14 to 15 voll range. Any suggestions or thoughts? Thanks... new to forum....