So here's my problem...

The battery on my bike (Sportster 1200) seems to be losing juice rather quickly and I can't figure out why. I previously thought that's just the way it is (hard to start), but since I recently had to re-charge the battery due to non-use for a week, I have now changed my mind and now think it's not getting fully charged. Once it was fully charged with my battery tender, it started up no problem and sounded great, but just the one time. The very next day it was back to "normal" and seeming a bit troublesome to start up.

I've looked at all the connections and everything seems tight, but I'm no mechanic. Is there something I'm missing or is this normal for a motorcycle or Harley?

Thanks in advance.