The strongest name cannot be shaken! Open up a new generation of HONDA “NSR250R/SP”


※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.


1988 NSR250R/SP “The world’s first electronically controlled carburetor + magnesium alloy forged wheel frame” performance has been greatly improved, firmly sitting on the “strongest” throne

In order to counter the hot-selling YAMAHA TZR250, HONDA launched the NSR250R (MC16) with amazing riding performance in October 1986. The riding performance of this car is shocking, just like the safety accessories are directly installed on the racing RS250R. Not only did it beat other competitors in performance, it also set an amazing record in terms of sales.

However, HONDA did not relax its pursuit. In January 1988, the newly revised MC18 was immediately launched. As a “decision version imitation model” that surpassed the first generation, the strongest throne that NSR grabbed is still as stable as Mount Tai.

In addition to improving the parts of the 90-degree V twin-cylinder engine, the world’s first PGM carburetor controlled by a computer was added. By adjusting the air-fuel ratio to the best state, the horsepower output band (power band) is used in the entire speed range, and the most powerful performance of the previous car models has been obtained. Even in March of the same year, the first SP version with magnesium alloy forged wheels was launched in the market. It was matched with the factory car color-Rothmans painted by the king of the World Motorcycle Championship (WGP). Warm praise from fans.

▲【1988 HONDA NSR250R/SP】The RC valve of the exhaust device evolved into II, and the maximum torque increased by 0.2kg-m. A frame with a pentagonal cross-section and a front fork with a large diameter of 41mm are adopted. It is more radical than the first generation, so many people regard it as the strongest car in history. ■Car weight 126kg (dry weight) Water-cooled V-twin engine Case reed valve 249cc 45ps 3.8kg-m ■Current price: 660,000 yen ※SP version

▲【1988 HONDA NSR250R】

▲The engine speed and throttle opening are detected, and the PGM (Programmed) carburetor of the solenoid valve is controlled through the electronic system to control the air jet. The ideal air-fuel ratio is maintained, and smooth throttle response can be achieved even at low and medium speeds, and even the ignition device is controlled by a computer.

▲The dashboard is changed to a 3-eye design fixed with sponge material, making the dashboard more racing. The speed red line area has also increased by 500 rpm to 11500 rpm.

▲The first SP version added in 1988, the front and rear wheels used magnesium alloy forged wheels (MAGTEK) 1.5kg lighter than the STD version. Compared to the racing version, which uses sand mold casting, the SP version uses gold mold casting. Since the SP version in 1989, dry clutches have been listed as standard equipment.

Even the first generation of cars in 1986 will surprise you.】The goal is to copy the WGP winning car = RS250RW, and jointly develop it with the commercially available racing car RS250R. Although the newly designed V twin-cylinder engine equipped with RC valves has plenty of horsepower, HONDA has improved its maximum horsepower to more than 60ps through small changes. The vehicle weighs only 125kg, successfully achieving the goal of the lightest weight, and has specifications that shock everyone.

▲【1986 HONDA NSR250R】

1990 NSR250R: In order to fight against the biggest enemy Γ, the Gull arm is adopted

SUZUKI’s RGV250Γ (VJ22) was released on January 30, 1990. The third-generation NSR-MC21 launched by HONDA on February 13th of the same year was also equipped with a new curved rocker arm (HODNA called it a seagull rocker arm). And MC21 even set its sights on the dynamic rigid balance, which also became a big topic at the time.

Although HONDA has been pursuing high rigidity from its previous generation, but in this version, the idea has been changed, by appropriately reducing the lateral rigidity to obtain high degree of freedom of control performance. The 90-degree V twin-cylinder engine continues the MC18 design and increases the popularity of electronic control. The intake and exhaust system has also been re-improved, successfully achieving soft horsepower output characteristics. Its high rigidity balance is second to none in the past generations, and it is well received by the audience.

▲[1990HONDANSR250R]■Car weight 132kg (dry weight) Water-cooled two-stroke V-twin engine Case reed valve 249cc 45ps 3.7kg-m ■Current price: 609,000 yen

▲MC18 (left) and MC21 (right). Compared with the previous generation of MC18, not only the width of the main frame and the rear swing arm is narrower, but it also has proper torsional rigidity when rotating. On the other hand, HONDA has increased the overall width of the frame to maintain the longitudinal rigidity required for braking. Even by enlarging the parts near the pivot (pivot), you can get a wonderful sense of control.

▲The engine has evolved into a PGM-III controlled by a computer. The origin of the name Gull arm is because its shape is very similar to that of Gull. The rear tires were changed from 18 inches to 17 inches.

▲MotoGP factory cars NSR500 and Γ have adopted curved rocker arms (ie, seagull rocker arms) since the 1989 season. HONDA’s commercial vehicles also adopted the same technology in the next year, and people can’t help but admire the rapid development of HONDA.


1994 NSR250R Even the performance curve can be changed

The ProArm single rocker arm, the more refined electronic control device PGM-IV, the brand new TB carburetor, etc., the fourth-generation NSR250R (MC28) has added a variety of new technologies. Nonetheless, its most notable feature is the card key system adopted for the first time in the world.

This design is not just to change the existing ignition key to a card, but also to adjust the ignition time/RC valve/carburettor solenoid valve as a precondition. HONDA’s racing department HRC has designed 3 types according to the actual situation. Cards with different performance curves. At that time, HONDA even planned to develop a system that could be freely replaced and rewritten using computers and card readers, but unfortunately it was not realized in the end.

▲[1994HONDANSR250R]■Car weight 134kg (dry weight) Water-cooled V-twin engine Case reed valve 249cc 40ps 3.3kg-m ■Current price: 680,000 yen

▲The card key system is jointly developed by HONDA and Maxell. The card key on the upper left of the photo is dedicated to the fuel tank cap and helmet lock, while the faucet lock uses electromagnetic type. If you install a full-speed horsepower HRC card, the functions of the lamps will stop.

▲The result of thorough pursuit of racing details is to remove the analog speedometer from the dashboard. The digital screen when the HRC card is installed, instead of the speedometer, is the water temperature display.

▲[NSR is also changed to ProArm single rocker]Continue to use the factory car NSR and the device of the commercially available racing RS. HONDA chose to add the ProArm single rocker to the fourth-generation NSR. But compared to the rocker arm set on the right side of the racing car, the fourth-generation NSR has the rocker arm set on the left side like the VFR series.

[The final model even added REPSOL coating]Rothmans, a major British tobacco company, CABIN, a major Japanese tobacco company, a beverage brand Terra, a clothing brand seed, etc., the NSR250R has had various sponsors. The final painting version of NSR250R used the REPSOL painting of the oil/gas company, a large Spanish company that sponsored the HONDA factory team that participated in the World GP500 competition at that time.

▲(Left) 1995 NSR500 (Right) 1996 NSR250R SP

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“WEB-young machine” exclusive license
“Webike Taiwan” editorial department compiled

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