Trials Australia Forums

Can anyone explain the guts of the TY mono exhaust system for me? Front section: does this have some sort of packing inside to keep it quiet, and does it deteriorate over time? And if it's no good inside, can I cut the muffler open, replace the packing and reweld closed again? If that's the case at all. Same with the back alloy section: does it also have a packing that
needs replacing? My bike has a loud bark to it and I imagine that it should run quieter, which I'd like it to do. Appreciate any advice regarding the packing, replacement or steps to make the bike quieter. Many thanks.

Front box has anti resonance lining, consisting of a thin layer of packing material behind perforated sheet material.

Cant see how it would be possible to repack this, and you would probably be better to fit a perforated core to take up 75% of the exhaust, and fit packing around it, leaving other the 25% as an expansion area.

TY back boxes can be easily repacked..............just cut out a window in the back, remove and replace the packing, then pop rivet a cover piece back over the window, sealed with silicone.

Thanks FM350. Second time you've helped me, much appreciated. I'll give your suggestions a go. Cheers.