"Tweaked" 801 stock muffler

Tom · Apr 29, 2025

To me the stock muffler is still my favorite; it's part of the very special design of the 801.
Here a couple of pics how it can be "tweaked" with a removable custom-made db-killer; it's still work in progress.

toast449 · Apr 29, 2025

Holy hell that must have been a lot of sanding and filing to get that fit that snug inside and out!

Tom · Apr 29, 2025

OK, you know what you're speaking about.

Yes it was indeed a lot of work to fabricate the adapter ring to fit it that snug. It took me some hours; but finally it works fine.

Tom · Apr 30, 2025

An additional pic of the short db-killer; now with some screws to fix the pipe in the adapter.
After a first short test with the modified muffler I'm very satisfied; I will give it a try on my next daytrip.

Tom · Apr 30, 2025

Here some short videos:

With the stock db-killer:

Without any db-killer:

With the short custom db-killer:

Tom · May 1, 2025

On today's daytrip I tested the short db-killer; the sound is raspy and not too loud; it's perfect to me.

Tom · May 2, 2025

Today I noticed that the pipe of the db-killer suddenly stuck a couple of millimeters out of the muffler.
I checked it; wondered that it was quite difficult to remove the db-killer; and that's what I've found; definitely not what I've expected.
The melting temperature of aluminum starts at about 600°C; the exhaust gases are too hot.
The adapter-ring made from 20mm aluminum doesn't work.