I wanted to have my bike sound louder and have better performance/economy by replacing the stock exhaust system with an after market set of exhaust pipes. After pricing many exhaust pipe replacement systems I decided to just "gut" the stock pipes.

I started by drilling around the inside circumference of the exhaust pipes.Then I used hammer and chisel to remove what was still hanging on, and pulled out the "guts" with pliers.Next I smoothed the inside surface with a portable grinding wheel. Then I painted the area with high temperature paint.

Photo of exhaust pipes.
Photo of exhaust pipes.
Photo of exhaust pipes.
Photo of exhaust pipes.
photo of exhaust pipes.

The pipes are much louder now, but I can't detect any improvement in performance or economy.

Back to where you started.