Despite how people say UNI's are good for high dust and dirt applications, I found this not true. I used a properly oiled UNI for my kart in July around dust and sand and on the first day of riding I found full grains of sand in the carb adapter along with a layer of dust. I've since moved to a K&N style with an oiled foam pre-filter and dont have that problem. Im not trying to badmouth UNI, but I just wanted to make it known to the OP that if you ride in sand and dusty conditions you might want to do what I did. Even thought the UNI did seem to flow better, the size of particles it was letting through was unacceptable IMO. Good luck, an air filter and header should make it feel a lot better!