Wow, hate to hear that.
As someone who has been in several smackups and has had to wrestle with adjusters and ins. companies, I would expect them to try and lowball you. Fender can't be that much, bike is only worth so much, blah, blah.
One thing you might consider doing is developing some neck pains and headaches. Since you usually have several years under the statutes to sue, time is on your side and the thought of future medical might prod the insurance company a bit.
I had an old Corvette that I totalled against a Chevy truck (their fault) and the ins. co. tried to lowball me on that big time. Talked to a lawyer who recommended I complain of some "aches and pains" and when I told the ins. co. I was in no hurry to settle now due to my impending medical problems; well, their attitude took a 180 when I gave them the lawyer's name. They settled for the amount I wanted that very day.
The ins. rep who was previously telling me to take a hike (seriously) had to "leave the office on an emergency" right before I showed up to pick up the check.