Filling up the tank

As the current round of Iron Builder rages on, Disco86 decided he needed some gas. So he built this Octan filling station. As nice as the whole build is, my favorite thing might just be the motorbike. Look closely- you'll see that (excepting the wheels) it doesn't use any prefab motorbike pieces. What it does use is this round's seed part, that 2x2 red inverted dome on the front.