Dune bike
 

I was looking at upgrading my polaris predator to be a good dune bike, but is it worth it? or should I just get a yfz like everyone else? Help please.

Just install some paddle tires and a new rear sprocket (to lower the gear ratio)--you'll be fine, and out a whole lot less $$ than a new YFZ.

i would get a honda or yamaha 450 or a raptor 700. u will get much more bang for your buck.

if you want a DUNE ONLY bike go with a banshee. It was bread as a desert bike and excels in the dunes

Although the Banshee, YFZ, etc, are great quads, they would still need paddle tires.

So, the least expensive option is to just purchase paddles tires and a sprocket for the the Predator, rather than a new quad.