After the exclusive news about the Mugen/GRP split, we are pleased to publish detailed pictures of the JX21-B01 engine and various parts. Click ‘Read More’ to view them.

The engine, OEM manufactured by OS engines for Ninja, is loosely based on their V-Spec with some custom features: the crankcase is from the OS 28XZ engine and does not feature the distinctive OS ‘black’ coating, the sleeve port design is a bit different from the V-Spec, head design, the crankshaft appears to have the same ‘DLC’ coating as the OS Speed V-spec but without counterweights. All in all a mix up of a few OS engines and Ninja branding.