Gut Factory Muffler

[Offroad]

I updated my cut away on the factory muffler...I know it's a "hack job", I'm no professional and only have common tools to work with, but I plan to either cover it back up with the bezel get a real machinist to smooth it up some more.

To get rid of that center pipe, I'm thinking I need an inside pipe cutter, but most I've seen are for PVC, I need a metal one about 5-6 inches deep. Any suggestions?

The cutters I've found are so expensive I thought about seeking out a plumber to cut it for me.

My main problem is IT SOUNDS SO GOOD, I DON'T WANT TO PUT THE CAP BACK ON! I think there is something about the "megaphone" design that a cap just ruins. And I LOVE THE BACK FIRING, I don't know why, I just do.

So I'm toying with the thought of cutting the cap mounting tabs off, cutting that center pipe back and I would almost have that uncapped 4-1 Kerker header on the Kawasaki Z1 900 I keep remembering as being the sweetest sound I've ever heard out of any motorcycle. I'm thinking with the tabs off, the pipe will soot back up quickly, and most will only see a flat black hole?

Or on that primary input pipe, daylight can be seen when the muffler is off. With the muffler off you can see there is another perforated baffle that could be cut way from the front of the muffler. Maybe then I will be satisfied with the sound with the cap back on.

Bottom line, I know it looks bad, but it sounds good, so I'm following the Engineering Creed - Function over Form ;-)

PS: I'm only doing this because I bought this used to experiment on, I have my original muffler safely packed away in case I ever need it.

http://www.esm.psu.edu/courses/emch13/de...rocess.pdf

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