The signal in the key ring wont kill the bike it only prevents starting(according to the dealer I talked to). sounds like something else is killing the bike. could be as simple as the key, If there are other keys or something on it causing the switch to have a bad connection on the plug or inside. Id use that key and try to get it to fali in the garage. center stand and start wiggling stuff until it dies. good luck
If you didn't crash at lease once, you were not having enough fun!