Possession of vehicle

First your decision to do what you did was foolish and you should NEVER do it again. The bike is yours if registered in your name. You should take bike back, and ride yourself or sell for cash to cover your losses if ex-BF does not have cash to buy from you. I have dealt with this issue countless times and it always ends the same: GF buys BF a sportbike because he NEEDS it so and they are fun, ex-BF cries and pouts, GF gives in because he promises to pay and she is scared because she will lose money if she takes back and sells bike as used. THEN BF a) wrecks bike b) bike is stolen c) rides bike ragged d) loses job e) ex-GF see BF with new GF on bike she paid for and she trashes it, (actually have handled that case) and the GF is stuck with no bike or junk pile and still owes all money on the loan. Its a tough pill to swallow, but if he was responsible financially, he would have had his own credit to buy his own bike and not used yours. You gambled on your relationship when the banks refused to gamble on his credit. Don't make same mistake twice. Take the bike back, sell it for what you can, miminize the loss. If you get back together, HE can buy a bike HE can afford.