I'm looking to buy a new four wheeler and have it pretty much narrowed down to a 650 H1 or a King Quad. I like the arctic cat but I'm concerned about it being carburated as opposed to fuel injected like the king quads. I will do most of my riding in areas were it will be common to go from around 5000 ft to 10000 ft in one day of riding, will the 650 handle that without having to rejet all the time? Thanks.

 

Read my article on 'air-jetting' in the Arctic Cat forum.
You can air jet it, plug the tubes, then as you go up in altitude and your mix becomes richer just unplug one tube and as you continue to climb unplug a second tube to let more air in. Cost $6.00 to do.
You can have as many tubes as you want. Open and close them as needed. In the winter you need only put plugs in the tubes to make the mix richer.
You can set it with one tube closed and one open, jet the carb. Then if you go up in altitude just open the second one, if you go down then close the first one -both.
Or you can have 4 tubes - have as many as you like.

 

If you jet the 650 for high altitudes, the 650 can easily handle 4,000 to 11,000' without having to rejet. You will feel a power loss in the higher altitudes but they work fine.