I flat track mine and this is what I did. 300EX shocks in the front and yamaha warrior rear shock ( need the ones with the remote bottle). I found a used sway bar  ( it is a linkage bar that essentially links both sides of the front suspension.....left side goes up, the bar pushes the right side down). I also recently cut 2" out of my swingarm to get more traction down. Stock suspension will be fine to start with. Just go out and get some tires and start from there. it's a blast!