Probably, it errors out the ABS system when the wheel speed sensors don't match front to rear. Not quite sure why you are referring to "older models" and then specifying pre 2014 bikes. 2010-11 are the first model years, 2012 was the first model year in the US, and 2014 is the first model year of the 2nd Gen bikes. "new pre-14 bikes"? It works on all Gen 1 bikes for sure. It should work on Gen 2 bikes as well, but I don't have one of those.
No one really knows, because by now everyone has figured out that the ABS on Yamaha's actually works. You never need to turn it off. You can install a switch, either by purchasing an over priced kit that contains a bit of wire, a generic switch, an inline fuse holder with fuse and simple directions, or just make it up yourself to install a switch in the ABS fuse circuit. You turn the switch off, ABS faults due to no power, you turn the switch on, the power connection resumes, but you still have to shut the ignition key off, then back on, to re-set the system.
Most people that install the switch, truly believing they need the option, discover that they use it very seldom, then never, after some experimentation and the realization that they gain nothing by turning off the ABS.
Lastly, if you feel you need the ability to lock the rear wheel off pavement...
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) Learn to ride w/o doing that and you'll become a better rider. And one that doesn't tear up the trails as much.
