The stock suspension is a POS and will cause your bike to wallow in a sweet twistie.
If at or near your lean angle limit, this can be scary because things motorcycle can and will dig into the pavement possibly upending your butt.
While certainly no sport bike, if properly set up, this big butted female dog can handle the twisties fairly well.
When ready check out Progressive 444 rear and front springs. Not the absolute best, but best bang for the bucks, IMHO.
I also hope you are running a ExedraMax 240/55R16 on the rear. With the 150/70R17 Road5 it sets up the best rake/trail for quicker, more stable cornering.