In developing RC213V’s powertrain, our aim was to create a motorcycle engine with MotoGP winning potential. We set ourselves the two following major goals: Achieve high enough power output to enable the speeds needed for MotoGP, and make the unit compact – as small as the 800cc engine that fits on the RC213V frame. To meet these goals as well as MotoGP regulations, we adopted a 1,000cc, 90° V4 engine.
High power output is achieved using a 360° crank phase angle, improving charging efficiency via favourable exhaust pulsing from the cylinders’ firing timing. The 90° V4 layout also maximises output through reduced friction – it reduces mechanical losses by omitting the harmonic balancer, has a smaller number of crank journals (3) compared to an inline four cylinder engine, and has a sealed crankcase design to reduce pumping losses.