This is our newest Laser dirt kart. It has 1 1/4" main rails. The front-end has been changed to allow for camber to be more easily adjusted. The caster blocks are also center punched so that the front-end geometry is not affected as much when you change the caster. The factory caster settings are RF 10 degrees and the LF at 9 degrees. The Momentum also incorporates the z-bar at the rear cross member and split bearing holders.        This is our newest asphalt kart. This kart uses a 1 3/8" right side main rail for less flex. The AV-7 has been changed proportionally from our AV-6. This kart is best suited for asphalt tracks with good grip.