The special models of Pinasco carburettors "R" were developed for the world of racing and for the most demanding tuners. The changes made to the Pinasco carburetors "R" increase the performance and allow an efficient and accurate carburetion. All Pinasco carburettors marked with the letter "R" have the internal passages CNC machined to guarantee the right flow of fuel and to eliminate the effect of "empty gasoline", also the passages of the float chamber cover are completely machined to allow a perfect filling of the float chamber. On the models SI 26/26 "R", the "Venturi" has been further CNC machined to increase the standard diameter and get the maximum size of 26.00mm compared to 25.40mm of the cheap model. The carburetor "R", with regard to the SI models, is the TOP of the range and it is a Pinasco’s sole model.The carburetor R is also available with the classic venturi VRX billet, also the range has been extended with the new venturi VRX dedicated to all the carbs 20/20.