The Six Cylinder Superbike Honda Shouldn’t Have Built

What if you climbed to the top of the mountain, only to find out you climbed the wrong one? In 1978, Honda released a masterpiece, the CBX 1000. It was the world's first mass-produced six-cylinder superbike, a machine with the soul of a Formula One car and the roar of a god. By every engineering measure, it was a total triumph. And yet, it was a complete and utter failure. This is the story of how the fastest, most advanced motorcycle in the world became a commercial dead-end, and why its magnificent failure was actually more important than its success. To really get the Honda CBX, you first have to understand the silence it was born into. For Honda, the mid-1970s were, well, a little quiet. This was the company that had turned motorcycling on its head with the CB750 back in 69, the world's first true superbike. But that once-mighty bike was getting old. The competition had caught up, and they were pulling ahead. Kawasaki had unleashed the Z1, a beast that stole the title of king of the road. Suzuki was making waves with its powerful and nimble GS series, and Yamaha's big-bore XS1100 was an absolute torque monster. The whispers started. Had Honda lost its edge? Were they more focused on cars? Had their bikes become reliable, well-engineered, and... boring? For a company built on the power of dreams, that was the ultimate insult. An alarm bell was ringing inside Honda's headquarters. They needed a response. Not just an update, a statement. Something so audacious, so technically overwhelming, that it would shut down all the critics and reassert Honda's dominance. They didn't just need a new king, they needed to build a whole new throne. The idea, when it finally came, wasn't new. It was a ghost, an echo from Honda's most glorious past. We have to go back to the 1960s, to the Isle of Man TT, the most dangerous and prestigious race in the world. This was Soichiro Honda's personal proving ground. In that arena, his engineers built gods of speed. The most legendary of all was a series of six-cylinder race bikes. The 250cc RC166 in particular was pure myth on wheels. It was a masterpiece of miniaturization. A 250 cubic centimeter engine with six tiny cylinders, 24 valves, and a red line that screened past a staggering 16,000 RPM. For perspective, that's an RPM that would cause most modern engines to simply explode. In the hands of the legendary Mike the Bike Hailwood, the RC166 was invincible, winning 10 out of 10 races in the 1966 season. But more than its wins, it was the sound that sealed its legend. It wasn't a bark or a drone, it was a high-frequency mechanical shriek that sounded like nothing else on earth. When Honda left Grand Prix racing after 1967, the six-cylinder ghost vanished. Now, a decade later with their backs against the wall, Honda decided it was time to bring that ghost back. But before we go any further, take a second and look at what Honda is about to attempt here. Because what comes next isn't just another engine story. It's a moment where engineers were allowed to ignore common sense and chase something extraordinary. If you enjoy deep dives into machines like this, the ones that pushed engineering too far, too fast, or in the wrong direction, make sure you hit like and subscribe. Now, let's see how Honda tried to turn a six-cylinder dream into reality. The man for the job was Shoichiro Irimajiri, the genius who had designed those championship-winning race engines in the 60s. He knew that just building a better four-cylinder engine wasn't enough. It wouldn't have that wow factor. The answer had to be six. The goal for Project 422 was simple. Build the fastest, most powerful production motorcycle in the world. The engineering challenge, however, was massive. The first, most obvious problem was width. Six cylinders in a row makes for a very wide engine. Early prototypes were so broad they were practically unrideable. Then there was the weight. Six cylinders, six carburetors, 24 valves. The bike was in danger of becoming an unwieldy land yacht. This is where Irimajiri's genius kicked in. To solve the width problem, he did something brilliant. Instead of mounting the alternator on the end of the crankshaft, which adds a ton of width, he tucked it up and behind the cylinder block. That one decision made the engine dramatically narrower. The result? An engine just two inches wider than Honda's own four-cylinder CB750. Then to save weight, the engine itself was made a stressed member of the frame. It wasn't just in the frame, it was part of the frame, which saved a huge amount of steel. Finally, the whole engine block was tilted forward 30 degrees, giving just enough clearance for the rider's knees. The final product was an engineering work of art. A 1,047 cubic centimeters air-cooled 24 valve inline six. In its 1979 trim, it put out 105 horsepower, making it the most powerful production motorcycle engine on the planet. The CBX wasn't just a motorcycle, it was a two-wheeled symphony designed to do one thing. Reclaim Honda's throne. The press launch was pure theater. When journalists first saw the bike, they were just floored. That engine, with six polished exhaust headers cascading down, looked less like a motorcycle and more like a Wurlitzer pipe organ strapped to two wheels. But the moment it fired up, any thoughts of its bulk vanished. The sound was impossibly smooth, and as the revs climbed, it transformed from a low purr into a ferocious spine-tingling wail that was pure insanity. It made every other bike on the market sound crude by comparison. The ride was just as dramatic. Below 6,000 RPM, the CBX was a surprisingly gentle giant. But twist the throttle past 6,500 RPM, and the beast awoke. A savage wave of power would launch the bike toward the horizon with an intensity that was shocking for the time. The quarter mile flew by in about 11.6 seconds, with a top speed pushing 140 miles per hour. It was, without a doubt, the fastest thing on two wheels. Even more surprising was its handling. Despite a wet weight of around 573 pounds, road testers were amazed at how well it managed its bulk. Cycle magazine called it a mountain road flyer beyond anyone's wildest dreams. On a smooth, sweeping road, the CBX was sublime. It was a magic carpet ride powered by a rocket. It felt, for a moment, like Honda hadn't just claimed back the throne, they had built a new kingdom. But perfection is a fragile thing. And the CBX was full of paradoxes. For every one of its strengths, there was a big fat butt that haunted its every triumph. It was the fastest bike, but its chassis was old school. While the engine was a futuristic masterpiece, the frame was still a product of 1960s thinking. It had spindly 35 millimeter front forks and twin rear shocks that were simply overwhelmed by the bike's mass and power when you really pushed it. Hit a mid-corner bump at speed, and that dream ride could turn into a nightmare weave. The chassis just couldn't cash the checks the engine was writing. It was agile for its size, but its size was still immense. That 573 pound weight was always there. And while the engine was narrow at the bottom, it was wide up top, making it a visually intimidating machine that was simply too much for the average rider. It was an engineering marvel. But that marvel was terrifyingly complex. A simple task like syncing the six carburetors was an all-day job for a professional. This complexity scared off not just home mechanics, but insurance companies who jacked up the premiums. The CBX was a masterpiece of excess. Honda had built an AMA super bike for the street, only to discover that most people just needed a ride to the grocery store. Beyond its dramatic character flaws, the CBX was plagued by a bunch of boring real-world problems that sealed its fate. First, the price. In 1979, the CBX had a sticker price hovering around $4,000. The problem? A brand new Suzuki GS 1000, a bike with nearly identical real-world performance, lighter weight, and far better handling, cost somewhere around $3,000. For many buyers, those two extra cylinders just weren't worth the larger price tag. Then, there was its thirst for fuel. That beautiful engine was incredibly inefficient. Riders reported as low as 25 miles per gallon when ridden hard, though 30 to 40 miles per gallon was more typical. This gave it a frustratingly short leash. In the late 70s, with the oil crisis still fresh in everyone's mind, a bike this thirsty was a tough sell. And while the engine proved robust over time, some early models had minor teething problems that were enough to create negative press and stall sales right out of the gate. Many 1979 models sat unsold on showroom floors, gathering dust, while buyers chose more affordable, powerful alternatives. But maybe the biggest problem was that the CBX had no stage to prove itself. Popular super bike racing classes were dominated by four-cylinders. There was no high-profile series where the CBX could show off its six-cylinder advantage without that win on Sunday. Sell on Monday marketing boost, it was a champion without a championship to win. All dressed up with nowhere to go. And here's the uncomfortable truth Honda didn't fully understand until it was too late. Because all those problems—the price, the weight, the complexity—still don't fully explain why a motorcycle this brilliant failed so completely. To understand that, you have to step out of the spec sheet and into the showroom. Walk into a Honda dealership in 1979, and the CBX was the gravitational center of the room. Riders stopped. Conversations died mid-sentence. Six chrome exhaust headers spilled out like a mechanical waterfall. It didn't just look different, it looked important. This wasn't transportation, this was theater. But admiration is cheap. Ownership is not. The CBX inspired awe. But awe doesn't sign loan paperwork. Most riders didn't see a motorcycle they could live with. They saw a machine that demanded commitment—financial, mechanical, and emotional. Six carburetors meant six times the anxiety. Insurance premiums hinted at danger before the engine even started. And its sheer presence asked a quiet, uncomfortable question. Are you really the kind of rider this machine deserves? For most people, the honest answer was no. The CBX wasn't intimidating because it was fast. It was intimidating because it felt serious. It didn't promise easy weekends or carefree ownership. It felt like a responsibility. A machine you had to justify, not just enjoy. And that made it a showroom paradox. People came to hear it. They brought friends just to point at it. Then they walked past it and bought something else. While Honda was building its monument to excess, the rest of the world was getting smarter. The Superbike War wasn't just about brute force. It was about balance, power, agility, and affordability. The CBX was an airliner in an age of combat jet fighters. Suzuki's GS1000 in particular was the CBX's nemesis. It was widely seen as the best handling leader bike of its day, offering a complete package that the heavier, more complex CBX just couldn't match in the real world. But the most painful blow didn't come from a rival. It came from inside Honda's own house. Launched alongside the CBX was its stablemate, the CB900F. It was a more conventional sport bike with a powerful four-cylinder engine. It was lighter than the CBX, nimbler, cheaper, and way easier to live with. And in terms of real-world performance, it was shockingly close to its big brother. The market's verdict was swift and brutal. The CBX drew the crowds, but it was the CB900F that customers rode home. It consistently outsold the CBX, proving that for most riders, four-cylinders were plenty. The king had been undermined by its own, more pragmatic prince. Now faced with terrible sales, Honda had a choice. Double down or change course. They changed course. The first sign of retreat was the 1980 model, where the engine was slightly detuned to 98 horsepower. For a bike built on ultimate power, any reduction was a step in the wrong direction. But the real surrender came in 1981. Honda officially gave up on the superbike idea and repositioned the CBX as a sport tourer. The raw aggression of the original was draped in a heavy fairing and offered with hard panniers. The chassis got a much-needed upgrade with a modern Pro-Link monoshock and beefier 39mm front forks. On paper, it was a more sensible bike. It was more comfortable, and the suspension could finally handle the engine's power. But in making it sensible, Honda had stripped it of its soul. The untamed beast had been domesticated. The bike was now significantly heavier, and its performance was no longer anything special. The pivot was a logical business move, but it was also an admission that the original glorious vision just hadn't worked. After one final update in 1982, Honda quietly pulled the plug. A machine born to be a king had died in exile. So why now? Decades later, are we still talking about the Honda CBX1000? Why do restored models now command insane prices? Why does a commercial failure hold such a revered place among the greats? The answer is simple. The CBX wasn't a bad motorcycle. It was the right answer at precisely the wrong time. It was the absolute peak of a design philosophy that was already dying. It represented the peak of the 70's horsepower war, just as the world was pivoting to a new ideal. Balanced performance and lightweight agility. The CBX was the last and greatest of the old guard. A magnificent dinosaur looking up at the sky as the meteor approached. Today, the very things that made it a failure are the source of its legend. Its crazy complexity is now seen as a testament to its builder's ambition. Its intimidating size gives it an unmatched physical presence. And its rarity, a direct result of poor sales, makes it a sought after collector's item. To own a CBX is to own a piece of engineering history. A symbol of a time when a company would build something not because it was practical, but simply because they could. And the idea never truly died. Its spirit lives on today in bikes like the Honda Goldwing series, proving the concept of a smooth, powerful six-cylinder motorcycle was sound. It was just waiting for the rest of the world to catch up. The Honda CBX 1000 is a monument to unbridled ambition. It teaches us that success and failure aren't always so clear. A machine can fail in the marketplace, but succeed in capturing our imagination forever. The CBX never conquered the market. But in the long run, it conquered something far more important. Our imagination. And in the grand museum of magnificent failures, the Honda CBX 1000 sits forever on a throne. The story of the CBX is a classic tale of engineering ambition hitting market reality. So what other glorious failures fascinate you? A machine that was brilliant in concept, but flawed in execution? Let us know in the comments below. And if you enjoy deep dives into the stories behind the world's most iconic machines, make sure to subscribe so you don't miss our next video. Ride safe, ride hard, and we'll see you in the next one.