Equipped with ram air intake! KAWASAKI “ZXR250R” pioneering a new generation


※The “first time” mentioned in this article refers to the “first time” of “commercial motorcycles that can be ridden on general roads”. In addition, the definition of “first time” may be different.


1989 KAWASAKI ZXR250/R the origin of the 2020 style ZX-25R

KAWASAKI, the only one of Japan’s four major motorcycle brands that did not sell a four-stroke 400cc imitation racing car, finally launched the ZXR400 in 1989. In order to catch up with the lagging situation, KAWASAKI adopted a large number of the most cutting-edge and radical equipment at the time, including the first commercially available car with an inverted front fork and an ultra-high-speed side timing chain water-cooled inline four-cylinder engine. , Aluminum alloy e-BOX frame, etc., transplanted from the factory car ZXR-4 equipment.

Although ZXR250 and ZXR400 use the same luxurious equipment as ZXR400, but ZXR250 has set off a topic because of the use of the world’s first ram intake duct. This equipment can introduce the wind generated during riding into the air filter to bring about a supercharge effect, thereby increasing the horsepower at the highest speed. Both cars are very combative in riding performance. The ZXR400 even won the Suzuka 4-Hour Endurance Race and the All-Japan TT-F3 event, and the ZXR250 also showed its amazing combat effectiveness in amateur events.

[1989-styleKAWASAKIZXR250/R]the car weighs 144kg (dry weight) 249cc water-cooled four-stroke DOHC 4-valve parallel 4-cylinder engine with a maximum horsepower of 45ps and a maximum torque of 2.6kg-m. The price was 599,000 in Japan at that time Japanese Yen ※The above specifications are all 250 data.

▲Only ZXR250 is equipped with a ram air intake duct. Although the duct above the fuel tank can easily be regarded as an air intake, it actually introduces the wind generated during riding into the air filter box through the vent under the fairing on the left side. Inside. Although the name ram intake duct has been used in GT380 first, GT380 is only equipped with a cooling device that introduces the wind generated during riding to the cylinder head. The first ram intake duct with supercharged effect The one is ZXR250.

▲ZXR250/400 all use an inverted front fork with an inner tube diameter of φ41mm, and the preload and damping can be adjusted at the same time. The inverted front fork can make the diameter of the triangle platform thicker, which can greatly increase the rigidity compared to the upright front fork, making the inverted front fork a must-have item for sports cars in modern times. ※The picture is ZXR400.

1989 style ZXR400

The ZXR400, which is the first to launch, uses a forward-leaning engine and an e-BOX frame that wraps the engine like an egg to achieve high-efficiency downdraft air intake. A duct extending from the upper fairing runs through the fuel tank to help the cylinder head Heat dissipation and cooling.

▲【1989 KAWASAKI ZXR400】■Weight 162kg (dry weight) 398cc water-cooled four-stroke DOHC 4-valve parallel 4-cylinder engine with a maximum horsepower of 59ps and a maximum torque of 4.0kg-m. The price in Japan was 730,000 yen at that time.


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“Webike Taiwan” editorial department compiled

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