Has anyone seen one of these tips for the stock XR250/ 400 pipe? I would like to adapt something like this to replace the screen type on a trials bike (it cloggs easily). The white Brothers web site does not have a place to ask questions. Does it say USFS approved on it? What is the diameter? How about length? The picture makes it look like the length could be reduced in 1/2 and it could be slid into a piece of tubing adapted to the end of the trials muffler. Does that seem feasible? I hate to buy one only to find out it would not work.
