if i installed the split brake kit on my sp500 would the lEFT HAND brake lever still control all 4 like stock or just the back?the one in the kit right side controls the front brakes from what i have underdstood.

 

From what I have heard, just the back. Haven't tried it myself, though.

 

I put the split brake kit on my Expedition 425. The left lever now only controls the rear brake. I found that the supplied hydraulic line for the right hand side was on the short side, so I bought another stock Polaris brake line and used it instead.
The left hand lever is very stiff after the split brake system is installed. The split brake kit supplier suggested a new (his) master cylinder for the left side that will make it much easier to control. I haven't done that yet, but will one of these days.

 

I was wondering about the brake system off a 6x6. They have Split brakes. I wonder about a price difference.