I suggest you put some pro taper bars on there. I put the same bars on as what the Polaris have but you have to modify the throttle side controls and die grind plastic out to get to fit. BDX has an aftermarket throttle that would work with this setup as long as you have a tether because you have to remove the throttle safety switch!
So I would suggest finding a set of pro taper bike bars that you like and putting the bolt on mountain bar on with the polaris style end hooks and some Moose racing heated grips. That way you dont have to modify your controls. This will be much stronger than the stock bars!
A set of big bars would be nice too. But you would have to get big bar clamps for these.
Hope this helps you out!