If you are truly the owner. You can contact your local DMV and request them to send you a replacment title. If they can't do it over the phone, you may need to go there with proof of identity and they will print you off a new one there or mail it to you.
If you have a vin you can simply go to your dmv and have a new title issued. It should cost very much and will show it is not stolen. However if you have no vin there is no way of identifying the bike and no way to prove ownership.