Used for only 600 km. - Improvement in: o Smoother performance. o Better aerodynamics. o Weight reduction (inertial control). o Higher refrigeration allowing less temperature due to the new variator design with sink. o Higher quality for all components of speed control, higher durability and less maintenance. - We get: o Faster operation. o Higher reaction on the throttle Press-Depress of the rollers. o Reduction of the fuel consumption. The new PRO speed control series, differs from version before by taking a heatsinks within the speed control in a circle provided with projections, between rollers area and bushing area. The rollers cavities are holed for the Press-Depress effect making them to act more quickly and smoothly both at the entrance to a higher gear as the output of a lower gear showing no jumps, it makes the air as fluid dynamic to help the rollers to emerge or be collected faster without increasing fuel consumption.