I am currently going through this same problem. Personally I would turn off the immobiliser if it meant my new key (new lock set) is going to work with my old ECM. I only found out that that is an option after I sent it off (the ECM and one key) to get it working/reading RFID.That is actually a brilliant idea. I wonder if just having it on the same keychain would be close enough to work. That way you would take it with you when you left the bike.
Sorry to bring this thread back but, I'm a little confused here? Do American models not use the immobilizer then?+1 on Suzuki. There's no reason that they can't keep a record of the codes and/or offer a replacement key service. Though I'd expect them to put you through some hoops before providing the key.
I'm not sure exactly what's going on with the ignition switch screws. My K6 uses the security torx type and the service manual lists the screw bit to remove them. The K7/K8 service manual only mentions the breakaway head type for all models. But the parts fiche lists the security torx type and a search for where the breakaway head type was used indicates that it was never used on GSX-R's. Yet I have a pic of a removed breakaway head type that I think came from here. The K9-L1 service manual shows the security torx type. Go figure.
Ok, I got worried for a minute that I was going to be in paying big bucks! Thanks!The immobilizer was not used on US & Canadian models. That's a major reason for different ignition switches, wiring harnesses, and ECMs. I can only guess but possibly the breakaway head screws were only used on European models and the service manual didn't mention the security torx type. Maybe Suzuki changed their mind after the service manual was written.