Here are some more sketches I did for the "We Draw Cars" blog, searching for a final design. I came across some photos of some old board track racers, and that's what inspired these.
I really liked the look of the blade style forks. These would work like normal forks, but the moving parts are hidden from view, so it appears the wheel is floating up and down between them.
This is a composite of a few sketches from above, and the ideal direction I'm heading. I'm going to integrate the exhaust a bit better on future iterations. I figured stuff like that might become more apparent once I start drawing it from different angles, and working out volumes.