I'm 6'3". There are quads I'm very uncomfortable on like the smaller Honda's. I like my knees to be at about a 90 degree angle or more for comfortable riding. Don't like when I have to fold my legs more than that for long periods. Weight is more of an issue riding quads. Do you have enough weight to counterbalance the quad in a turn? Ride time and experience are the best teachers. I've seen smaller folks on big utility machines. Most of the folks I've seen knew enough to not push the machine as hard as someone who has the weight to influence the quad.
Thanks for all the ideas guys.... i weigh 140. What would you recommend for me