Hmm. This battery is only 1 year old, but I noticed it being a bit weak already. Still always use the Tender Jr. full-time on it. I left it off the charger for a while, then asked the bike the voltage (ignition, not running), and it showed 12.2V. That seems a bit low, even with the computer/dash up and the running lights (which are LED withOUT load resistors). I am not sure how much draw there is in that state, but it is maybe around 20-30W?
Had a 30 min ride, then parked it elsewhere, it sat for a few hours, came back, turned on ignition, and it showed 12.2V again. It did start OK, just sounds a bit weak still. Rode home, plugged in the Tender Jr, which goes red for a while, then after a while it is green. Rinse and repeat. Every chart I find shows 12.2V at around a 50% charge. Example:
https://footprinthero.com/lead-acid-battery-voltage-chartsIt could be the battery is crap (previous one of same brand lasted 3 years). Just seems so strange, since it is always maintained and it rarely even gets below freezing here. Could be the Tender Jr. isn't doing its job. What voltage does YOUR Concours show on the dash when you think it is fully charged and has been off the charger?