The 600cc(ish) supersport sector used to be one of the most hotly contested segments in motorcycling, with screaming, apex-hunting machines like the Kawasaki ZX-6R fighting it out for supremacy ...

The ZX4RR boasts an inline 4-cylinder 399 cc engine that is truly impressive, delivering a sound reminiscent of superbikes like the S1000RR, CBR1000, and ZX10R. It reaches an astonishing top speed ...