I have the 3.1 gallon IMS tank on my 13 WR450F. I'm looking for a locking gas cap as I don't want to tempt fate when parked. Does anyone with this setup use the Ascerbis Locking Gas Cap? http://www.rockymountainatvmc.com/p/923/38227/Acerbis-Locking-Gas-Cap They don't advertise thread pitch unless I missed it. Any other suggestions?