yes it will work, the abs 'reads' what both wheels are doing and if one stops under braking and the other is still turning it momenterily releases the brake.

doing the spinning trick confuses the abs [car stuck in snow has the same effect] though if the engine is stalled/stopped and restarted the system should reset so the abs will be back on. it will be a long day if you are on stop start trails and reseting each time,
i guess a fuse removal or inline switch might be one way round, thought i don't suppose insurance companys or yamaha warranty would appreciate such a move. personally i would perfer the abs off on a switch for off roading

the gs has a switch you hold down on startup which disables the system and on startup resets to abs on, thats what happens to this lucky guy! http://www.youtube.com/watch?v=OrD65...4BB72&index=37