Locks only stop honest people. If someone wants to steal your ride bad enough they'll get it. Seriously though, most people can figure out how to put 2 wires together to turn the ignition on or in the case of my X disconnect 2 wires. I wouldn't worry about theives being able to hotwire your quad. Usually they'll roll it off. It's a lot quieter that way.
1987 Honda/Powroll TRX300X - Set up for MX (District 14 #570)
1983 Honda CR125R
[
URL=http://www.geocities.com/stoaste/quadpics.html]Pictures of my 300X[/URL]