i've been trying to do away with all the plastic on my boardtracker. while wondering through walmart yesterday, i came up with a cool idea for an air filter. it all starts with a $5 ss toothbrush holder. there where a few to choose from, but only one type with a tight fitting lid. http://i148.photobucket.com/albums/s7/icyuodd/IMG_0928.jpg i used the plastic screen in the stock filter as a template /screen. i did have to remove the taps with an x-acto. http://i148.photobucket.com/albums/s7/icyuodd/IMG_0932.jpg you'll need to drill a hole for both bolts and the nut that holds on the choke, and of coarse, holes for the air to flow through. http://i148.photobucket.com/albums/s7/icyuodd/IMG_0938.jpg once the holes are inplace, its just a question of bolting the toothbrush holder to the carb (you'll have to replace/cut down the original bolts), adding a sponge and your done. http://i148.photobucket.com/albums/s7/icyuodd/IMG_0941.jpg http://i148.photobucket.com/albums/s7/icyuodd/IMG_0942-1.jpg while i'm not sure its improved preformance,it hasn't hindered it. does look cool though.