Has anyone tried an aftermarket pipe on the bike. I'm most interested in the Pro Circuit or Big Gun since I can get it thru my dealer and get a good price on it. I don't want it to sound like my 250 cause the bike will be street legal (lights and stator were shipped yesterday) and I will be poaching a BMX track or 2. Is the BBR pipe too noisy? I've done the flywheel,air box, jetting,14t cog, and springs. How about the 150 kits or bigger carb?