RE: REVERSE LIGHT FLASHING
Does it cut out when the reverse light flashes? If so then your reverse switch is dong the same thing a lot of 2007 700 Grizz's have done. I fixed mine by grounding out the reverse switch. There is a thread on here that gives great instructions on how to ground it out. You will loose the reverse light but no more cutting out. And you can run full throttle reverse with this mod also.