yes you can you just go into the software on the PC and add fuel then re flash the bike - but if you mean on the fly nopeI am thinking about doing that. I have a 2014 FLHTCU with the Sert, Stage 1 and the Screaming Eagle Street Cannons. It runs great, but there are times when I might want to add a little more fuel, and I can't do that with the SERT.