The Kawasaki Ninja ZX-25R: 250cc, 4 Cylinders, 17,000 RPM (2024)

The Kawasaki Ninja ZX-25R: 250cc, 4 Cylinders, 17,000 RPM (1)

Motorcycles

Though it makes a motorcycle with a 200-hp supercharged engine, Kawasaki also offers bikes with engines better-suited to newer riders. Bikes like the Z125 Pro, and the Ninja 400 sportbike. And as bikes like Honda’s RC166 show, sometimes the smallest engines are the most impressive ones. That’s a sentiment the upcoming Kawasaki Ninja ZX-25R clearly …

byMatthew Skwarczek

Published on

3 min read

Though it makes a motorcycle with a 200-hp supercharged engine, Kawasaki also offers bikes with engines better-suited to newer riders. Bikes like the Z125 Pro, and the Ninja 400 sportbike. And as bikes like Honda’s RC166 show, sometimes the smallest engines are the most impressive ones. That’s a sentiment the upcoming Kawasaki Ninja ZX-25R clearly shares.

Kawasaki Ninja ZX-25R details

The Kawasaki Ninja ZX-25R: 250cc, 4 Cylinders, 17,000 RPM (2)

Many high-performance Japanese vehicles, both cars, and motorcycles tend to feature small but high-revving engines. For example, the Acura Integra Type R’s 1.8-liter four-cylinder redlined at 9200 RPM. That’s because large-capacity engines are taxed more heavily, and burn more fuel. One way around that is to raise engine redlines. Another is to add more cylinders. The Kawasaki Ninja ZX-25R does both.

The Kawasaki Ninja ZX-25R: 250cc, 4 Cylinders, 17,000 RPM (3)

The current Ninja 400 has a 399cc two-cylinder that redlines at about 12,000 RPM. And on Cycle World ’s dyno, it makes 44 hp and 25 lb-ft. But the Ninja ZX-25R’s 250cc four-cylinder revs all the way to 17,000 RPM. All while howling like a possessed chainsaw.

As of this writing, Kawasaki hasn’t released the Ninja ZX-25R’s output. But RideApart reports it’s estimated to 50-60 hp. That would put it squarely between the Ninja 400 and Ninja 650 in terms of output, according to Cycle World. And just like Kawasaki’s other ZX bikes, the ZX-25R comes with a host of track-focused features.

The Kawasaki Ninja ZX-25R: 250cc, 4 Cylinders, 17,000 RPM (4)

Firstly, the 6-speed manual comes with a quickshifter, Cycle World reports. The Kawasaki Ninja ZX-25R also comes with traction control and ABS, Revzilla reports, as well as multiple riding modes. And its steel-trellis frame is derived from Kawasaki’s World Superbike racers.

The Kawasaki Ninja ZX-25R calls to mind some of the Japanese sportbikes released in the 80s and 90s, Cycle World muses. Although these bikes were carbureted and two-stroke, they also had small-capacity four-cylinder engines. Ones which could rev as high as 19,000 RPM. In fact, the Ninja ZX-25R’s name is similar to a bike Kawasaki released back then, the ZXR250.

However, it’s possible the Ninja ZX-25R will share somethingelse with the ZXR250 besides engine capacity: lack of US availability.

Pricing and availability

As of this writing, Kawasaki hasn’t announced if the Ninja ZX-25R will come to the US. So far, it’s been confirmed for Indonesia, Japan, and New Zealand, VisorDown reports. Even European sales are still uncertain.

One potential reason may be the price tag. In New Zealand, the Ninja ZX-25R is listed for the equivalent of $10,440. That’s only $500 less than the ABS-equipped Kawasaki Ninja ZX-6R goes for in the US. And while it only has 2 cylinders, the ZX-6R is more powerful.

But does that mean US sales are a total impossibility?

Could the Kawasaki Ninja ZX-25R still come to the US?

The Kawasaki Ninja ZX-25R: 250cc, 4 Cylinders, 17,000 RPM (5)

The Kawasaki Ninja ZX-25R wouldn’t be the first small-capacity four-cylinder motorcycle sold in the US. Honda did it in the 70s with the CB350 Four. Unfortunately, because of its higher cost and minimal performance gains over the two-cylinder CB350, it only lasted 3 years. It’s likely, therefore, that the Ninja ZX-25R would be too-niche of a product to be viable in the US.

However, the bike wasn’t originally intended for the New Zealand market. But strong and persistent customer demand caused Kawasaki to reconsider.
Plus, the US has less-restrictive emissions regulations. If the 250cc four-cylinder is clean enough for Europe, it’s clean enough for the US.

And although the CB350 Four wasn’t popular in the 70s, today it sells at higher prices than the two-cylinder model. If enough US riders want it, perhaps the Kawasaki Ninja ZX-25R could be sold here.

There are 17,000 reasons why we’d like that.

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The Kawasaki Ninja ZX-25R: 250cc, 4 Cylinders, 17,000 RPM (2024)

FAQs

What is the rpm limit of the ZX25R? ›

The engine is mounted in front of the gear and is powered by a multipoint indirect electronic injection system with DOHC distribution and 16 valves, four for each cylinder; delivers about 50 HP and can reach 17,000 rpm.

How much HP does a Kawasaki 250cc 4 cylinder have? ›

Kawasaki Ninja ZX-25R Power-trains

The Ninja ZX-25R is powered by a Liquid Cooled 250 cc 4 Cylinder engine that gives 43.5hp of power at 15500 rpm and 21.2 Nm Torque at 13000 rpm. It comes with the option of a 6-Speed transmission gearbox. The Ninja ZX-25R has a seat height of 785 mm.

What is the top speed of ZX25R 4 cylinder? ›

MILEAGE AND TOP SPEED

Kawasaki Ninja ZX-25R mileage is expected to be around 25 kmpl. In terms of performance, the 250cc 4-cylinder sportbike is expected to accelerate from 0-100 kmph in less than 6 seconds. Kawasaki Ninja ZX-25R top speed is 187 kmph (company-claimed).

Is ZX25R good for beginners? ›

What would be a good motorcycle to start with for a beginner sportsbike rider, Ninja 300/400, ZX-25R, YZF R3 or Gixxer SF250? Ninja 300, R3, etc will all be good beginner bikes. The ZX25R is not the same given that is 4 cylinder and likely targeted towards a more experienced audience.

What RPM do you shift a Ninja 250? ›

Normal shifting with conservative riding (i.e. around town, with traffic light) should be done between 6-7k rpms, sometimes even lower around 5.5k.

What is the maximum rpm range? ›

What is the maximum RPM and torque for engines? Maximum RPM and torque varies by car and engine. Biger engines have more torque, smaller engines have faster accelerations. My 2011 Hyundai Sonata has a max RPM of 8000, but the rev limiter caps it out at 6500 RPMs or so.

What is the best 250cc 4-stroke engine? ›

Yamaha's YZ250F has been victorious in our 250F Motocross Shootout since 2021.

How fast does a 250cc engine go? ›

250cc motorcycles are distinguished by their engine capacity and can reach an average top speed of approximately 85 mph (137 km/h). However, the actual top speed can fluctuate based on the motorcycle model and type.

How much horsepower does a Kawasaki ZX-25R 4 cylinder have? ›

Kawasaki Ninja ZX-25R Specifications

The top variant of Ninja ZX-25R is powered by the Standard a 250 cc, 4 cylinder Gasoline engine that fires 43.5 hp of power and 21.2 Nm torque.

Is ZX-25R supercharged? ›

Even the ZX-25R aims for another dimension of speed with a supercharger, just like Kawasaki!

Is ZX-25R a superbike? ›

Kawasaki Leisure Bikes

The only in-line four model in its class, the Ninja ZX-25R features an all new in-line four engine which delivers superior performance, eclipsing all other bikes in the 250cc to 300cc field. Key chassis dimensions were inspired by Kawasaki's World Superbike Ninja ZX-10RR racing bike.

Is 250cc too much for a beginner? ›

We agree with that consensus that 250cc motorcycles are the way to go for beginners. But if you're not convinced, here are some reasons why you should consider this engine size for your first bike.

Is it hard to ride a Kawasaki Ninja? ›

The two-cylinder Ninja 650 is actually a better beginner's bike than the 600cc four and doesn't require premium unleaded gas plus it has a more comfortable seating position.

Is zx25r comfortable? ›

It's comfortable enough to handle touring and long rides, but with enough grunt to hang with almost anything you'd encounter in a straight line.

What is the top rpm of ZX 10R? ›

The Kawasaki Ninja ZX-10R is powered by a 998 cc air-cooled engine which produces 203 PS @ 13200 rpm of power.

What is the rpm limit of the Ninja h2r? ›

AVAILABLE COLOURS
Engine & Transmission
Maximum power228.0 kW {310 PS} / 14,000 rpm
Maximum power with Ram Air240.0 kW {326 PS} / 14,000 rpm
Maximum torque165.0 N.m {16.8 kgf.m} / 12,500 rpm
Electronic Rider Aid
11 more rows

What RPM is the rev limiter? ›

There is considerable variation between manufactures on where to have the redline for their engines: from 100 to 12,000 RPM. If an engine goes overspeed, commonly called "over-revving", damage to the piston and valvetrain may occur when a valve stays open longer than usual.

What is the highest rpm for Ninja 400? ›

The Kawasaki Ninja 400 is powered by a 399cc liquid-cooled parallel-twin motor making 45PS at 10,000rpm and 37Nm at 8,000rpm, mated to a six-speed gearbox.

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