I used a unifilter adn i dont kow what bike it was for , the shop just had a rack and i went in there before i put on my 28mm carbs so i was just took them in with me and fit them if you want to do this you need to first measure you carb. go to the local shop and start trying to match up the the size make sure you get a filter thats a little bigger so itwill fit over the carb. the unifilter i used has a spring inside that would have fit over the stick carb but not mine, so i cluped the spring and just clamped on the foam, (make sure you leave the spring inside or the filter will just cave in when the motor starts sucking in air). because the airbox suports a bunch of wires and the coolant tank i had to cut mine in half( dont matter cuz yur not gonna need in any more) then just remove the stock manifolds and clamp the filters straight onto your carb. you may have to change the jetting i didnt because the new carbs came pre jetted for pipes and after market intake, it was also jetted for a lower altitude and the huge jump in air flow balanced it out.
you may want to get filter skins or outerwears, i didnt but thats me. doing this means no serious mud bogging, riding on a wet track wont hurt but dont try swamp riding.