Here's a tip for XR owners. The first thing anyone does when they first purchase a Honda XR, is remove the snorkle or baffle in the airbox. It really helps the bike breathe, but I was a little concerned about junk making it's way in the airbox. I wanted to put filtration material on the opening but wanted something a little more professional looking than duct tape. Here's what I did: Go down to Wal-Mart and get a Rubbermaid Servin' Saver Plus storage bowl (the 750mL size). It is rectangular and the top is a perfect fit for the opening on the airboxes of XR200's and 250's. You just have to cut out the center section out with a utility or exacto knife. It is even detented for easy cutting! While at the store, pick up a pack of Vent Filters. I got the Electrostatic Register Filtration type that are 4" by 12". I cut them in half and it fits over the airbox opening perfectly. Then you just place the top of the storage bowl over that! You have an efficient, sano filter. You can even put a little filter oil or WD40 on it to help with dust. I know it works for XR200 and XR250. I probably works for other XR's. The bowl top fit snug in between the frame rails. Try it out, it works great!!