The 20th anniversary event of the opening of the Honda Collection Hall was held on the south course of Twin Ring Motegi last July 16 and September 24, 2018. The usual dynamic confirmation tests were racers and others in many cases, but this time around 20th anniversary commemorative commodity special running was carried out, the epoch-making model from the dawn of Honda to the present showed off running.
6 cylinders were named X = Ultimate CB
Honda has demonstrated high engine output by multi-cylinder engine in the 1960's world GP. It can be said that multi-cylinder = high revolution high output became possible by making the engine stroke short stroke by making it multi-cylinder, and by making the valve operating system per cylinder light. In the 250 cc class, we introduced a six-cylinder racer called RC 166, showing the overwhelming performance of winning the whole game. Even in commercial vehicles' Honda announces the world's first mass-produced commercial motorcycle 4-cylinder machine CB 750 Fore in the year, the market enters the age of civil war with large displacement displacement multi-cylinder. Already the liter 4 cylinder shifted to a natural era, each manufacturer started to search for a new flagship.
And in the '78 years Honda announced it is the CBX of an air-cooled 6-cylinder machine. The 6-cylinder commercial vehicle itself was Italy's Veneti 750 Say, but this is a race for the Japanese motorcycle 4-cylinder machine, to the 500 quattro of the 4 cylinder made to imitate the CB500 fore, the 2 cylinder It was developed by adding. CBX, on the other hand, was a perfect new design suitable for Honda's flagship. Concept is RC 166. The displacement is 4 times, but adopts a diamond frame for air-cooled DOHC 4 valve 6 cylinder. Even the method of applying thermal distortion and vibration countermeasures by connecting the Oldham joint with three camshafts × 2 camshafts that will become long at fine points also complied with RC 166.
[HONDA CBX July 1978]pursuing the ultimate appearance as an air-cooled 4-stroke motorcycle . Mass production of the same DOHC 4 valve 6-cylinder engine as GP racer for the first time in the world. Honda's first 1000cc class super sports. ■ Air-cooled 4-stroke 6-cylinder DOHC 4 valve 1047 cc 105 ps / 9000 rpm 247 kg 5-speed change front W disc brake 6 carburetor
[Honda RC 166 1967]In the '60s world GP 250 / 350cc class, Honda was demonstrating overwhelming strength by introducing the DOHC 4 valve air-cooled 6 cylinder RC 166/174. ■ Air-cooled 4-stroke parallel 6-cylinder DOHC 4 valve 249.43 60 ps or more / 18000 rpm 112 kg
The engine width is narrower than the CB 750 fore and the bank angle secures 41.5 degrees
Aiming at deepening the bank angle and reducing engine friction, the crankshaft has a small journal diameter and pin shaft diameter, and ACG with large inertial mass is located on the rear of the cylinder, not at the end of the crankshaft. As a result, the engine width was narrower than the CB 750 for the time, and the body bank angle was successfully secured at 41.5 degrees. The primary shaft is disposed behind the engine, ACG and ignition device are attached to both ends of the primary shaft, and the starter motor is a mechanism to drive the primary shaft. Furthermore, in order to secure a natural riding position and to enable knee grip, arrange so that the intake port of the cylinder head concentrates toward the center of the motorcycle body. The left and right triple carburetors are made to be V shaped in the center.
In order to minimize the weight of the valve system aiming at a high rotation and high power type engine, a direct pushing type valve lifter is adopted, and the shim is arranged at the head of the lifter for easy adjustment of the tappet clearance .
The carburetor is a negative pressure type made by Keihin of Φ 28 mm. The wheel is Honda's own comstar and has introduced the FVQ damper to the rear shock. The meter imaged a fighter aircraft and the handle was a separate type.
Coverage of coverage: Honda Motor Co., Ltd. / Honda Motorcycle Japan
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Original Source[ Young Machine ] (*Japanese)
