The exhaust plug for KTM 390 Adventure is to be used when the bike is stored for the winter or during power wash to prevent water from reaching inside the exhaust.

It fits perfectly with the stock exhaust. Surely it works with the KTM 390 Duke as well (i cannot test this).

I modified a Kawasaki Ninja model and went through some number of iterations until i made it to fit snug. Of course i had to add the KTM logo because its …well… KTM :) and i love it. I will update the font to match the original KTM font soon.

Hope you will find this useful.