The Honda CB500 Super Fore was unveiled at the Chongqing Motorcycle Show in China last fall. Although the frame has changed from a double cradle to a diamond and the rear shock has changed significantly from two to one, the CB500 SuperFore still retains the image of the CB400SF. What is the reason for this and what is the design rationale? A professional motorcycle designer will explain the design.

Commentary: Veteran designer from a certain manufacturer
A veteran designer who has worked on numerous models since joining a Japanese manufacturer. He has worked on a wide range of models, from the fastest flagship models to tasteful models and mini-bikes. This time, he explains the design of the CB500SF as far as he can from the photos.

A return to the "first generation" symbolized by the tank shape

Honda CB500SF unveiled at the Chongqing Motorcycle Show in September 2025

I haven't seen the actual bike yet, just pictures, but my first impression is "The SuperFour" that everyone can already tell is the successor model.I think the reason behind this styling is the high presence of the CB400SF in the Chinese market.Although the CB400SF is not officially sold in China, used models flow from Japan, and I hear that it has become a kind of envied car, a flagship of the legend over there.Since the SF is so popular that local manufacturers have been making copies of it, the sales side must have strongly demanded "styling that is clearly recognizable as a Super Ford. I feel that this is a straightforward expression without adding any strange new interpretations.

Honda's booth at the Chongqing show displays successive generations of the CB400SF to showcase the strengths of the "Legend."

The popularity of the CB400SF in China is also confirmed by the presence of "look-alike" models. The photo shows a ZXMOTO 500F model.

So where does this "super-forwardness" come from, we can smell it especially from the shape of the fuel tank. The tank of this CB500SF is a homage to the original CB400SF (NC31) and its higher model, the CB1000SF (SC30), and looks very close to what we designers call a "section," which is the cross-sectional shape of the tank when cut into a circle.The sections of the fuel tanks of the SC30 and NC31 are said to have been inspired by the rear fenders of the Porsche 911 and the tank of the CB1100R, the former flagship of Honda, and feature a bell-shaped or sloping shoulder. The CB500SF also has a gently sloping shoulder section, which is one level below the tank cap, where the Honda emblem is affixed.This tank treatment is partly for functional reasons, to escape the handlebar grips and switches, but it also results in a strong sense of the tank's NC31 and SC30 characteristics, which we believe is the main reason why the CB500SF has a strong "first generation" smell.

Here is a rough sketch of the CB1000SF (SC30). The fuel tank and tail cowl sections are clearly "sloping shoulder" shaped, inspired by Porsche rear fenders, etc.

The first CB400SF (NC31) was released in 1992. Compared to the CB500SF below...

You can see that the overall impression, especially the atmosphere created by the fuel tank, is close.

The fuel tank of the CB500SF. The "sloping shoulder" aspect is located above the wing mark.

Here is the NC31, with the "nadir" section around the "DA" in the HONDA emblem.

As for the NC42, the predecessor and the final model of the CB400SF, it has a new detail between the face of the tank cap and the side face that looks like it has been gouged out with a spoon. Thiswould make the switch between the upper and lower faces look bolder, while also incorporating the escape function of the handlebar switch.The fuel tank section is therefore more square and boxy, not naggy-shouldered.This is obvious when comparing the surfaces on which the Honda emblems are affixed: the wing mark on the CB500SF appears to lie in the depth direction, whereas the NC42 stands vertically, and I believe the entire mark is clearly visible.

The NC42, launched in 2007, is a FI version of the previous NC39 with FI and other improvements. The photo shows the final model, which will be discontinued in 2022.

The difference between the NC31 and NC42 fuel tank sections is illustrated in the following image: the NC31 has a "straight shoulder" line from the top of the tank, whereas the NC42 has a cut-down surface from the top of the tank, and the surface where the emblem is affixed (the blue line) is more raised than that of the NC31.

Comparing the tank emblems of the CB500SF and NC42 from the side, we can see that the CB500SF is lying in the backward direction, while the NC42 is vertically up. That is how different the tank sections are.

From this point of view, we can feel that CB500SF sought the "super-forward" look of the NC31, not the NC42.... The design of the fuel tank has the greatest impact on the impression of a motorcycle.The reason why the sections of the NC31 and 42 are different is that the NC39 (introduced in 1999), the previous model of the NC42, was designed after the CB1300SF (SC40, introduced in 1998), a high-end model that debuted at the same time. Just as the NC31 and SC30, which debuted at the same time, shared a common design element, the NC39 and SC40 may have unified their design direction.

The NC39 CB400SF, launched in 1999 with a newly designed chassis and an engine with "HYPER VTEC" that switches between 2 and 4 valves, has a section of the fuel tank that is quite different from the NC31, including a spoon-gouged shape between the tank top and sides. This tank shape was also carried over to the NC42.

So, why did the NC39 differ from the NC31 in the fuel tank section... perhaps because of the importance of commonality with the CB1300SF (SC40), which was introduced the previous year, 1998? As you can see, the tank shape is quite similar.

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The overall lines also go back to the first generation. Is the frame based on the naked premise?

Let's return to the CB500SF, this time focusing on the overall lines.The horizontal line of the tank bottom drops down toward the side covers, then connects to the horizontal top line of the side covers, and then lifts up to meet the line coming up from the side covers with a click around the tandem seat.The CB500SF and NC31 are also very similar in the way these lines are routed.Conversely, you will notice that there are no such lines on the NC42, and no bumps exist in the bottom line of the seat.

CB500SF; note the line under the fuel tank to the side cover to the seat, dotted in red.

The way this line runs overlaps with the NC31 to an impressive degree. The design of the side covers as independent elements, which will be discussed later, is also common.

In contrast, on the NC42, the line under the tank leads to the side covers, which are continuous in design. The line under the seat is also straight, with no clicky bounce.

More to the point, the treatment of the side covers themselves also returns to the grammar of the original NC31; in the NC42, the side covers were connected to the flow from the tank. In the NC42, the side covers were connected to the flow from the tank, integrating the outlines and surfaces of each part to create a sense of continuity between the two parts, making them appear as a single mass.On the CB500SF, however, the tank is a tank and the side covers are side covers, and the elements are separated. Although the shape is different, this concept is the same as that of NC31, and like NC31, the color scheme is blacked out to promote the separation of the elements.Comparing NC31 and NC42, the triangle of the frame where the side covers fit is much smaller.We suspect that this is due to the frame pipe behind the air cleaner box being moved back, or the upper pivot of the rear shock being moved forward, or both.The frame of the NC42 is almost the same as that of its predecessor, the carbureted NC39, but it may be that more room was added around the intake in anticipation of the later FI conversion. In any case, this smaller frame triangle may have made it more difficult for the NC39 and NC42 to express solid volume side covers like the NC31. In contrast, the CB500SF has a diamond frame, free from the classic "curse" of tightly fitting exterior parts into a double cradle frame like the SC30 and NC31. Furthermore, the width of the tank and the treatment of the tank seams look relatively natural on this new frame, which leads us to believe that it was originally designed to be a naked model. This is probably the reason why the overall lines appear elongated and sleek.

Compared to the NC31 on the far left, the NC42 in the center appears to have a retracted frame pipe in front of the side covers (note the distance from the swingarm pivot), and the triangle in which the side covers fit is smaller. The side covers on the CB500SF, with its diamond-shaped frame, are free from these restrictions of frame form.

The odd trick of making it look like a long tank

Another hidden design feature of the CB500SF is the fact that the fuel tank looks long for a modern motorcycle.The long tank is an element unique to so-called classic motorcycles from the era when the rider's seating position was in the rear, but modern motorcycles have a forward seating position, making it very difficult to reproduce a long tank. All the vehicles in the "neo-classic" genre struggle with how to create this long tank look.The CB500SF also has a very modern body structure.Thenewly designedengine has a short front/rear length and a longer swingarm, resulting in a modern and sporty configuration with a center of gravity that is much closer to the front.However, the line at the rear end of the fuel tank is sloped backward, and the line at the front end of the seat is adjusted to match this angle, creating a very good visual impression of a long tank, which is also reflected in the tank graphics.In other words, the lower half of the body is modern, while the upper half contains classic, relaxed elements, with the long tank at its core. The CB500SF is a bike like the CB500SF.

The rear end of the fuel tank is sloped back and the line of the seat matches this, creating a visually long tank effect; compare this to the NC31 and 42.

Furthermore, the CB500SF also has a nice overall "horizontal" feel. The top and bottom lines of the tank, the line at the top of the side covers, and the flow of the muffler assembly.You can see thatthese multiple key lines are kept almost horizontal, creating a familiarity that is typical of classic motorcycles. While there are many bikes with aggressive designs in which each line and detail asserts itself individually, the designer's sincerity and strong will can be felt in the way he has kept the overall flow simple. It is a "neat design" that is well controlled.

The four lines shown in the line are almost horizontal, which emphasizes the level feeling of the car body. Although parallel lines are not a must, such detailed treatment greatly affects the overall neatness of the body.

A Struggle between Modernity and Classicism

Looking at the details, the treatment is very modern while still having a classic feel. Take the headlights, for example. It has round eyes, but the LEDs are split into upper and lower halves, a unit that is similar to the GB350 and CB1000F. The rim of the light is not rounded as in the past, as if it were made by iron stamping, but rather, it is processed as if it were cut with a sharp edge.Furthermore, this rim is quite thick in the front view, and although the CB500SF's headlight unit itself is small like an LED light, the case itself shows the effort to make the volume look bigger...somehow. The volume of the headlight is very important in terms of the overall proportions of the vehicle, so it must have been controlled.Also, the light rims and stays, which used to be shined with chrome plating, are now expressed in satin or aluminum-like metal, which contributes to the overall modern impression. In this day and age, plating can look a bit old-fashioned, but I feel that the classic desire to "place shiny objects" is expressed through modern textures and processing methods.

The headlight rims have a characteristic shape with edges and thickness, which seems to be a control to make the lights, which have been downsized by the use of LEDs, look more voluminous. The satin-like metallic effect is also modern.

The tail lamp has two round eyes, which is somewhat surprising for a CB. Originally, the tail lamps of the CB400SF had a square lens with a round light-emitting area inside, but when designing the CB500SF, the designers must have reinterpreted the "super fours" and arrived at the simple expression of two round lamps. I guess it is one of the options in the evolutionary process.There are some who may disagree with the change to TFT LCD gauges, but this is something you will probably get used to after a year. The same was true when the rear shocks were changed from two to one in the past. In this day and age of smartphones, this is a bigger benefit.

The CB500SF has two round-eyed taillights, a design not often seen on CBs...

The conventional CB400SF has a design with two lamps shining roundly in a square lens. A development of this?

The LCD meter tends to be a spearhead, but it is indispensable for taking advantage of the latest features, such as the "Honda Roadsync" smartphone integration.

Although not mentioned in the text, the engine has a high cylinder height for its displacement and follows the BIG-1 style of "a magnificent tank and a magnificent engine" here as well. The oil filter, which was placed in front of the engine on the NC42, has been moved to the oil pan area, which looks more beautiful. If they moved the filter for design purposes, that's a big deal, but in any case, it must have contributed greatly to the freedom and handling of the exhaust pipe."

Conversely, are there any areas of concern? When asked, "I am concerned about the fact that the stripes on the tank appear to be slightly backward compared to the momentum of the tank bottom. The distance between the stripe and the bottom edge of the tank narrows as you go backward, making the horizontal tank look backward. I feel that a slight adjustment of just a few millimeters could enhance the styling. It's just my own trivial impression..."

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Worth it because we have been making them for 30 years

All in all, this new model is a "no-frills" design. It combines modernity and universal classicism at a high level, and I think there are few people who dislike it if they are fans of science fiction.A model change a decade ago might have included abrupt lines and details in an attempt to force a new look. This time, however, the heritage and values that have been spun over time are honestly reproduced in the product appeal and styling. We will continue to create for our customers the "value of time" that money cannot buy. I think this is a very good corporate activity.More than 30 years have passed since the CB400SF made its debut. Having that much history is a strength that no emerging Chinese manufacturer can ever imitate. Honda-san has been able to use their "legacy" weapon honestly and skillfully. This is one car that shows such a margin and sincerity toward its users.

The CB500SF was literally the center of attention in Chongqing, and when it appears in Japan as the new CB400SF, it is sure to create a huge sensation as the long-awaited revival of the 400cc 4-cylinder naked bike. We have high expectations for it!

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