2013 Kawi 1700 Nomad starting issue

2013 Kawi 1700 Nomad with 20,000 miles. It has a Cobra fi2000 module, Vance & Hines exhaust, and Kawi light bar has issues starting. I have a Bikemaster TruGel MG20Ch-BS battery that is less than two years old. When left on trickle charge, voltage reads 12.97. It will crank and run and the battery voltage holds at 14.8. The issue comes when the ignition is turned off and try to restart the bike. On second attempt, the voltage drops, and the starter struggles to turn, but the engine will...

2013 Kawi 1700 Nomad starting issue