Soldered the crimp because I was at 12.3 volts at idle and not much better at 2500 rpm. After the fix, I am getting mid 13s at idle. Goes up to 14.6 at around 2200, then starts dropping steadily back to about 13v at 5k rpms. Is this right? The bike has a finned black rr, but it is a 4 wire shunt...