I had a 2004 1150gsa for a while too. Biggest piece of crap I've ever owned. Surging, over heating and pinging in traffic, burned oil, wimpy front forks,and lots of very expensive parts with a long history of going bad.
Kept it two months and unloaded it. Hope you didn't end up with my old bike. Sorry, I feel your pain.
Every bike I ever owned, was the best bike I ever owned when I owned it. Well, except for that one Harley