Most powerful sub-400cc motorcycles

Kawasaki ZX-4R

​The most powerful sub-400cc motorcycle is the Kawaski ninza zx-4r, which produces up to 79 bhp with ram air induction. Other powerful motorcycles in this category include the Kove 450RR, with 69.7 horsepower, and the KTM 390 Duke, which boasts a new 399cc engine and is known for its high power-to-weight ratio. The Kawasaki ZX-4R is the most powerful and also the costliest bike in this list (for good reasons, of course). It has a 399cc in-line four-cylinder engine, which produces 76bhp at a staggering 14000rpm and 39Nm at 13000rpm of torque. With ram air induction, the power figure rises to 79bhp! With its high-revving 399cc engine, sporty ergonomics and track-focused hardware, the ZX-4R delivers a riding experience that mimics full-blown supersports. Despite all that performance, it weighs just 175kg, which makes it the fastest sub-400cc motorcycle