The new bore/stroke ratio of 1.84:1 (112 mm bore/60.8 mm stroke) has superbly increased the revolutions thanks to the ultra-short stroke of the crankshaft, while the larger surface of the piston has led to an increase in valve diameter. Compared to the 1198 Testastretta Evoluzione engine, the intake valves have gone from 43.5 to 46.8 mm and exhaust valves from 34.5 to 38.2 mm.