I pulled the baffles out of my stock mufflers. I cut the CAT off, about 4 inches long at the far end of the baffle. I notice there is a block in the center of the baffle, looks like to force the exhaust through the perforated inner pipe, to the outer pipe, around the plug, then back through the perforated pipe and finally out. The baffle, after the cut off, is 15 inches long. The inner pipe is 1 3/8 inches ID and the outer pipe of the baffle is a smidget bigger than 2 inches OD. Of course I want to allow the engine to breath more, and at the same time have a little bark, and I don't want to wear ear plugs. I can't find anyone who sells cores and I would like to keep the stock mufflers and save a few bucks.
Does anyone know if I should bore the center plug out? Does anyone know if the inner 1 3/8 inch pipe is large enough? I do plan to have the bike tuned after I settle this baffle. Any suggestions?