I'd try that. If that doesn't work, maybe the mechanism that turns the lock piston out broke and so you can't bring it back in. Being someone that recently disassembled my ignition and put the lock piston mechanism back in upside down, it could happen. Even though the piston is metal, the piece that turns is plastic, at least on the 1000RR, and likely on your GSXR. If that's the case, just take off your ignition. That's no easy task outside now that it's cold and if you can't get off your top triple. Also, you could see if you can get something in front of the lock piston and push it back in. If it's broken and there's no broken pieces in the way, you should be able to just push it back in.