I am just posting this as an FYI for those who may have purchased SuperATV's powersteering unit. From what I understand it has a thermal shutdown switch. If it over heats it will shut off until it cools down. Well, I had this happen to me last weekend. It happened right after I bottomed out really hard. I bottomed out so hard I figured I had broken the unit especially when it didn't come on after driving for several miles.
So, I parked it and looked for a severed wire or a disconnected wire--nothing. I ate lunch and it was back working again. I figured it would shut off after hitting alot of bumps in a short amount of time, but mine shut off from a single hard impact.
Let me tell you, after driving with powersteering and going back to manual...I can't even believe I drove this thing with out runnning into a tree before. It was back to holding on to the steering wheel with two hands and quickly shifting, so I could put my hands back on the steering wheel. If you ride in rocky terrain it will be the single best upgrade you make. I would rate it even before suspension.