Minimichael, that baffle setup in the pipe I was referring to has a clean and clear hole through the center of it. The exhaust exits the muffler into a round piece of screen wrapped with fiberglass insulation. There is no blockage or change in flow or pressure behind your original muffler. It would only modify the sound coming out the back.
DIY Mini Bike Glass Pack Style Muffler/exhaust
- Thread starter nightgrider
- Start date
Though, not where I expected this thread to go or end up. I've enjoyed the thoughts and discussion. Originally was just wondering if others had tried it and what the tone was like. Loudness wasn't much of a concern of mine, as I live out in the country and ride off road. But I do find the discussion of variable exhaust interesting. That's the great part about this site the welth of knowledge and open discussion. 
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While not a mini i figured I share my simple scrap pipe glass pack I built for my old t555
The black through pipe has many cross drilled holes and wrapped with woven fiberglass mat.
The outer caseing was slid over the matting and capped off.
It sounded and performed well, kind of a mellow putt putt putt at idle much like a oe quad muffler.
Mid throttle it was still very tolerable but started getting loud.
It sounded best from a distance while decelerating.
I had a short wide open header on it for a while and the muffler was a incredible overall improvement.
The black through pipe has many cross drilled holes and wrapped with woven fiberglass mat.
The outer caseing was slid over the matting and capped off.
It sounded and performed well, kind of a mellow putt putt putt at idle much like a oe quad muffler.
Mid throttle it was still very tolerable but started getting loud.
It sounded best from a distance while decelerating.
I had a short wide open header on it for a while and the muffler was a incredible overall improvement.
