1. Take inadequate security measures
Some bikes are stolen by skilled, determined thieves who would probably bore through solid rock if that’s what it took. Others go because the owners are naïve to the level of risk. In fact loads do, every year, putting up insurance premiums for everyone.
The factory-fitted steering lock will take seconds for an opportunist to break. Rely on it and there’s a very good chance you’ll never see your bike again after day one.
Get a disc lock, get a ground anchor (or two, one for each wheel), get big chains - and use them. You’ll never regret taking too many security precautions.