Reds report that they introduce some updates to their R series buggy engines in order to increase reliability and performance, and to lower the fuel consumption. The R5T will come with the long needle carburettor that is already being used for the R5 engine. The part improves fuel economy and guarantees a linear power output. The updated R5 will come with a completely redesigned crankshaft, in order to guarantee higher performance and efficiency. Compared to the previous crankshaft, the general surface finishing has been improved in order to provide a better fluid dynamic. Moreover the red silicone filling reduces weight and the rotating mass.