I like my pre filter very easy to clean and easy to remove just 4 screws. This setup is very cheep to do. In in dirty contions I just pack a extra pre filter with me.
My ktm 990 adv runs great. My stock air filter , Harley pre filter 2 into 1 with FMF Q4 pipe . I run 150/152.5 main jets with IMS 2 1/4 out floats at 3mm stock needle at 3 positon everything else in carb is stock. elevation is 300
Back to the Dyno tomorrow.