I recently picked up a WR400. It is bone stock (only 86 miles on it!) with the stock pipe. The bike will only run with the baffle pulled out. With it in, it won't idle and keeps wanting to die every time I blip the throttle. The baffle seems to be blocking the exhaust flow to the point that the engine won't even run. With out it, it runs awesome....but LOUD!!! Actually I really like the sound, but I don't want to tick of my neighbors, so I'd like to quiet it down. I'm thinking of cutting the baffle down to get some more exhaust flow. Has anyone had any luck doing this?