Out riding this weekend on a 2012 SG, the computer light and the battery light comes on. Volts drop from 14 to 11, then after about 20 miles the volts drop to 8 and the lose power while running. Any suggestions?
My guess is you need a new battery. Check error codes. I'm surprised it's running with that much of a voltage drop. My 08 Fatboy wouldn't start cause the fuel injectors had a low voltage error changed battery all was good. Check the charging system too.