There's a lot of stuff you can do. The right tires will make a world of difference. Some decent shocks would make the ride over all those rocks and ruts a lot more bearable. Some decent skids would be a must. Maybe smaller sprockets, little more ground clearance. Nerf bars with pegs built in with deep spiked pegs. Hand guards, rubber isolated bars and or steering stem, hydro steering stabilizer, good brake pads and rotors that will shed mud. Then motor stuff, keepin it cool. Coolhead of some type, oversized radiator, water pump impeller, maybe one of those finned deals that goes inline. Porting, reeds, carbs, pipes, air box mods for low to mid power and to pull the heavy 6 ply tires you'll prob want. Heavy duty clutch and springs and a billet clutch basket. Maybe a decent gripper seat cover to keep your ass glued to the seat when it's all slimy. What else you need? Sky's the limit.