A fixed point will give you a better feel if the movement in the shot. It with be a stationary item to "which the world revolve around".I really like the front fender, I'm not to sure why you need a reference point in the shot cant see a benefit of it?
The fixed point will give you a better perception of speed, and what the bike is doing.
Without you are just "flying" through the roads and not getting much feel for the ride.