Cam It Up! | Fuel Moto Hop-Up, Part 2 Photo Gallery
Fuel Moto Hop Up Part 2
17. At the backside of the throttle body, Jim cleaned up the runner ports as well. Often times the ports aren’t exactly the same size with one side of the port being thicker than the other, causing the port to not mate up with the intake port of the head perfectly. Jim cleans up the runners so that the air will rush into the cylinders unobstructed.