Re: Trials offroad motor bike??
That got me thinking. That Model 3s muffler said though suppress sound add more washers that are the way a gun silencer works. Washer soft spacer washer soft spacer, so on and so on. I think it would be interesting to research baffle systems to see what would be the most surprising and still not lose too much horse power. I seen on another thread that flex pipe quiets the noise also. I could see cutting a galvanized thin wall pipe in two halves and on one side weld a washer like baffle then space and washer and so on, twist screen onto donuts to put in-between the washer like baffles and then weld the it back together and cap the end with a small down pipe. Also I know the Honda express muffler is very quiet, if you can find them on eBay.
Always do a pre-ride check. Make it a habit, and ride safe.