Join Date: May 2018
Location: Staten Island, New York
The Speedmaster 2018-2019 tank is a direct swap. Many people have purchased a new one from the dealer which is costly. I found a used one on E-Bay from a dealer for a great price. If you are patient you will come across one as more Speedmasters are purchased.
Trirocket3 has installed a T120 tank but took much fabrication to make it fit, I believe only the fuel pump is a drop in replacement. The only other model tank to probably fit is the new SpeedTwin (more difficult to find as they are not in every dealer yet) or 2016 onward Truxton but I have not heard of anyone doing this swap.