I have much experience running karts through the woods, dirt trails and fields. Make sure you don’t develop more than about 35 mph as you can easily lose control on uneven ground. I’ve had a few trees jump out in front of me. You need at least 4″ of ground clearance. You can’t just put knobby tires on a racing kart. Inspect the frame regularly for cracks. You also need a low gear ratio and a heavy duty clutch along with at least 5 hp. Briggs raptor (flathead) is not good for bumpy trails as the carb will break off. Honda Clone is your best bet. Cross country karting is great fun in the right area. Whatever you do stay off the roadways.
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience