I like to Upgrade My vehicles. put Parts that make it run better. the XR600/650L,R & NX650 are similar. While looking on Ebay at Air Filters, I started to see Differences between Air Filters. Is the Air Filter for a NX650 better than a XR650L, or XR650R or XR600. Does anyone have acess to all 4 Air Filters, that can take a Picture of the Air filters next to each other, so we can See for ourselves, which is the Better Air Filter?