I had a '93 NH750 with stock pipes. I knocked the heads off the rivets that hold in the baffle with a cold chisel, took the baffle out and cut off about 4 inches of the pipe, put the baffle back in and secured it with sheet metal screws. The bike sounded GREAT! Not too loud, a good snarly growl, but it popped on decel. I took the baffles out and added a thumb screw in the center, cocked at 45 degrees to flow, and it worked perfectly. It sounded even better, and the popping stopped.