Four cylinders with 250 horsepower and up to 60 Kawasaki ZX-25RR were exposed.

As we all know, the Indonesian version of Kawasaki ZX-25R can generate 50p horsepower at 15500 rpm, which is equivalent to the performance of 1000cc in terms of horsepower ratio generated by exhaust volume. Recently, Japan exposed an enhanced version of Kawasaki ZX-25R, which is called Kawasaki ZX-25RR. It is rumored that Kawasaki will release their research results soon.

The basic configuration of this ZX-25RR engine is the same as that of ZXR250, but it is different from the cylinder diameter X stroke, from 49mm? x？ 33. Change1mm to 50mm? x？ 3 1.8mm will have some influence on the performance, because its stroke is shorter than that of ZXR, and it seems possible to further improve the engine speed.

Famous Japanese engine designer: Kazunori? Inagaki) said:

"I think as long as we improve the gas/exhaust system and simply adjust the ECU, we can easily reach about 55ps. The air cleaner hopes that the suction resistance of the filter element is small (although this will reduce the dust collection and service life), while the muffler hopes to exhaust completely without catalyst, and the fuel is limited to high octane number. If the engine interior is changed, I think the maximum horsepower production speed itself can be increased to about 17000 to 18000? Rotation speed and peak output can reach above 60ps.

In addition, the compression ratio of the forging piston is increased to about 12.5, the opening and lift of the camshaft are slightly larger, the throttle valve is expanded from 30mm to 3 1mm or 32mm, the length of the rubber funnel is also shortened (it is a disjoint cylinder at first, so it seems that the real transmission device can be used), and the computer settings will be reset. "

If this rumor is true, then it is certain that the piston material will be of top quality, so it is accompanied by super durability. Of course, this is to withstand the explosion of about 166 burns per second at the maximum power (20000 rpm).

Looking back on the 1980s and 1990s, that is, the golden age of four-cylinder motorcycles with a displacement of 25Nmcc, starting from Honda CBR250RR(MC22), Yamaha FZR250R, Kawasaki ZXR250R and Suzuki GSX-R250, they all have great potential, that is to say, they have great engine cycle (about15000-65430).

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.