2007 Ninja 250, 15k miles. After 5+ years of flawless operation, this problem just appeared. As soon as I turn the key to the ON position, the battery voltage immediately drops from 12.8V to 2-3 volts and pegs a 30 Amp in-line ammeter. No headlight, no horn, no starter. Guessing there is a short somewhere in the system but not sure how to isolate it. Any suggestions of where to start looking greatly appreciated. Thanks.