See: Novarossi

Novarossi have introduced the new Mephisto .21 nitro engine. The Mephisto features a 4 ports design to supply a linear power output and to keep fuel consumption low. The new crankshaft with a larger bore intake to increase the mixture flow and has a special shape to optimise gas-flows in the engine and it comes with DLC coating to improve durability. The new R4/18 conrod is redesigned and made with a special aluminum alloy that allows it to have a high resistance while maintaining the lightness and performance of the previous R4/17. The carburettor features three tuning needles giving a better idle and improves the ability of the engine to return to low rpm after throttling. The new head is redesigned to improve the flow of air and thus increase cooling and ensuring an optimal center of gravity. The engine is available with rear high quality ceramic or steel rear balls bearing.