Yamaha MT-01 Stock Muffler Conversion

My version of the stock muffler conversion for the Yamaha MT-01. Catalyst converter is maintained, stock end caps are the same and different db killers can be used. It also can be converted to a Akrapovic style end cap. 41mm db killer has been cut to 90mm length inside the actual muffler and is 5mm outside the end cap. Also the 50mm db killer is now flush with the endcap (these can induce a lot of nasty noise to the exhaust gases). The db killer basket does nothing except turning the sound worse. Better to