RE: what kind of 4 wheeler do you use?
I just (in November) got a new Yamaha Grizzly 700. It's a great machine and has the power assist steering. My guess is that the other manufacturers will come out with it also in the near future. I'd highly recommend the Grizzly. With that being said, the Hondas and Polaris are good too. I do highly recommend the fuel injected models. Field and Stream did a review of the new Yamaha. Check it out!