gordonfi
XS400 Enthusiast
I'm wondering how then, there can be back pressure when the baffle is simply two pipes welded together routing exhaust from one direction into a zig zag pattern with nothing to restrict it. Besides, I can't believe Yamaha would sell a new bike that had a sound like straight pipes. Wouldn't pass sound level bylaws. Anyway, I did pack them with fiberglass and the sound is lower and most importantly, It runs MUCH better.
It is possible though, that these are not stock mufflers. That would explain a lot. Because there are hex screws on the back end of each to remove the baffles. So they must be aftermarket mufflers. Thanks everyone.
It is possible though, that these are not stock mufflers. That would explain a lot. Because there are hex screws on the back end of each to remove the baffles. So they must be aftermarket mufflers. Thanks everyone.
