Hey Adam, I hope you haven't disposed of her yet. You know, decisions made under duress are often not the best. Why don't you keep it a few months longer and then decide what to do with it? It won't be worth nearly as much for sale as it would be if you were to decide to bring her back to life sometime later on.
Also, I agree with the suggestions for getting a lawyer; however, there is something easier you can do if you want the investigation opened up. File a complaint. Write up a letter detailing what happened step-by-step. Keep all emotion out of your letter (this is key) except for the last paragraph where you explain how much you were (additionally) emotionally hurt after feeling violated by the theft of a motorcycle that was more than just a possession....
Send the letter to the P.D. and cc anyone you can possibly think of. I'd include the city council, mayor, state legislator & senator and US representative, the state police and anyone else I could think of. What happens is that the P.D. usually cannot file your letter away because too many eyes are watching. Once paperwork is started, it has to go through several steps before it can be filed away. At a minimum, someone would need to review your case, and were it I, I would insist that the investigator not be from the local P.D.
One other thought: See if you can check on stolen vehicle records for your area during the past year. Your case would be hugely helped if a bunch of other bikes have been stolen.
It has worked for me. My complaint had to be investigated by the commander of the SP in the next county.