Hey have a 05 brute force 750 its the kvf750a when i got it there was a small switch wired in i dont know why its wired to the speed sensor, reverse override and main power from ignition

 

Have you tried to use it?

Kind of sounds like you answered your own question. It is either a reverse rev limiter override or maybe even a limp mode bypass.

Since it is not factory I am sure you can just remove it.

 

Ok thanks that's kinda what I was thinking but there's no change in the way it runs with the switch on or off