Sorry to learn of your misfortune and the loss of your bike and accessories - absolutely sickening.
I sincerely hope the thieves are caught and dealt with in an appropriate manner and all of your belongings are returned in their original condition.
I feel sorry for the police who spend time and money (Tax Payers) searching, apprehending/arresting and the gathering of evidence to produce in a court of law only for the judicial system to let them (Police) and the victim down by giving the culprits a slap on the wrist or a laughable and inappropriate fine or sentence. It must be very frustrating for all concerned.
I also hope that if your possessions are not found your motorcycle or household insurers pay up, but I fear you may have problems with this as you state that your garage alarm was switched off at the time.
Good luck and best wishes,