I recently swapped out my leaky Bing for a 15mm Dellorto SHA on my Maxi and am trying to figure out about the air filter. I took off the black plastic cover right away and then tuned it in pretty well with a 65 jet. It was 4 stroking a little with a 67 jet so I tried removing the metal mesh and now she rips...Is it a bad move to run it without any filter or is there some other mod that you've done to allow maximum air without the dirt getting in? Thanks.