After buying a 95 XR250L I find myself financially unable to ad R headers and buy an aftermarket muffler. I have removed the snorkle, adjusted valves, & rejetted the stock carb with pretty good results but, I would like to de-restrict the exhaust. Is there anything I can do with a stock exhaust with an A1 muffler to open this bike up some? I pulled out the baffle and found there were no visable plates. Just a screen with baffling material wrapped around it. Advice anyone?