2013 Yamaha Stryker without baffles 

I used a combination of drilling holes and using a Dremel tool to cut out the first bit. The pipe was the hard part. That was about 20 minutes of hammering per pipe. Each had 2 welds at the other end. I used a crow bar and a hammer to break them up. The plate at the other end is still there but by now it is opened up quite a bit. I love the way it sounds. This was a much cheaper option than new exhaust.