Whatever she tells you to do until your testicles drop.
If you love her and respect her, just own up to whatever you did, cause she's always right even if she wrong. If you don't, grab the keys, start the bike and don't look back.
Get a car and a new girlfriend
If you have the title to the motorcycle .. go to the police and have them come with you to retrieve it.
Sell the bike
Oh, so it's been sold already
When you get them back make spares!!
keep her on your room and lock the doors :p
Put the thing on a trailer and put a new lock on it you ninny!
Kick her out its your keys and she as stolen them.
Be a man and get your keys back.
Otherwise she is stealing them from you.
Check trousers for **** and balls first if you have some use them go get your keys and don't consider drinking and riding full stop or you end up where you all do