Since i will be building my own custom fuel cell with a 1098 fuel pump assembly in it i can go any route i want. Not much of the fuel cell will be visible, and it wont be big. Maybe 8 to 10L?! However the top will be visible in bare aluminium so it needs a pretty, clean and lightweight gas cap. Here we go!

My dad did make a good point. Retro?! It needs a breather hose on top going into the steering stem. Lets see how we solve that later in the build.