Yes, the carb has uni-pod filters and I'm @ sea level. I was thinking a 27.5 pilot also because if I had the air screws turned 1.5 turns out, I couldn't start it after let it sit 10 mins. after doing 20 of riding w/o choking it to crank it. Like I said before, the air screws are turned all the way in now on both carbs and that's the only way it will crank without having to use starter fliud and restart on first kick after getting warm.