The 400cc Anomaly
Resurrecting the high-revving, inline-four legend for the modern purist. An unapologetic track weapon prioritizing a rich, sensory experience over conventional metrics.
Engine
399cc
In-Line Four
Max Power
80 PS
w/ Ram Air
Redline
>15,000
RPM
USP
The Sound
Banshee's Wail
The Core Dilemma
The ZX-4R isn't defined by its displacement, but by its price. This forces a philosophical choice: do you invest in an unparalleled, track-focused experience, or opt for the greater outright horsepower offered by larger rivals for similar money?
Select a rival above to see how the Ninja ZX-4R stacks up in a head-to-head comparison of key specifications.
Deep Dive
Explore the engineering and technology that define this unique machine. From its high-revving heart to its superbike-derived chassis, discover what makes the ZX-4R a class of one.
The Tuner's Dilemma: Global vs. US Spec
A significant point of discussion is the power difference between global and North American models. The engine's mechanical capability is electronically restricted in markets like the US, flattening the power curve above 11,500 rpm. This creates a "tuner-ready" platform where an ECU flash is seen as a necessary step to unlock the bike's full, globally-advertised potential. Use the buttons below to see the difference.
The Final Verdict
The ZX-4R is a brilliant, audacious, and deeply specialized motorcycle. It's an "experience machine" that asks its owner to value the quality of the ride over the quantity of horsepower.
For the Track Purist
An experienced rider who craves the unique character of a high-revving engine and prioritizes handling above all else.
DEFINITIVE BUY
Recommendation: Opt for the ZX-4RR.
For the Value Seeker
A rider prioritizing all-around performance and the most horsepower-per-dollar from their purchase.
CLEAR PASS
Alternative: Kawasaki Z900.
For the Novice Rider
A first-time sportbike owner looking for a forgiving and cost-effective entry into performance riding.
CAUTIOUS PASS
Alternative: Kawasaki Ninja 500.
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