Recently, I put my fourth battery in the Sport at 'almost' 93,000 miles/ 150.000 km. In all fairness, I would probably be on my second, but I use the bikes' to step down batteries into my lawn and garden tractors as they require. Tractor battery plays up? Bike gets a new juicer.
The battery that just played up in "swampee" the Cub Cadet was nine years old and came out of the Sport 4 1/2 years ago.
The "new" PC545 came directly from Odyssey with a May 2014 manufacturi
I would say, for sure, starting will discharge the battery briefly, but the regulator should bring it back up if it's throwing 14.2 volts. But how long is your daily ride, ten or fifteen minutes? And stop and go traffic where the voltage at idle may be discharging (
12.4 volts for an AGM is quite flat (65%).
I would do a couple things: first, measure voltages 1) key off, 2) after 3 minutes of high beam, 3) during cranking, 4) at idle, and 5) at various rpm (2000-4500)