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A New Era of Motorcycling

The Honda CB750, introduced in 1969, stands as a pivotal moment in the history of motorcycling. It wasn't just a motorcycle; it was a paradigm shift. Before the CB750, motorcycles were largely seen as unreliable, underpowered, and uncomfortable machines, primarily for enthusiasts. Honda, with the CB750, changed that perception dramatically.

Sandcast vs. Die-Cast CB750 Engines

The distinction between sandcast and die-cast engine cases on early CB750s is a key factor in determining a bike's value and desirability among collectors.

Sandcast Engines

  • Production: The first approximately 7,400 CB750s produced in 1969 featured sandcast engine cases. This method involved pouring molten metal into sand molds, resulting in a unique, rougher finish.
  • Characteristics: Sandcast engines are often prized for their perceived strength and character. Some enthusiasts believe they offer better performance, though this is largely subjective and difficult to quantify.
  • Rarity: Due to their limited production, sandcast CB750s are highly sought after by collectors, commanding premium prices.
  • Challenges: Sandcast engines can be more prone to imperfections and leaks compared to their die-cast counterparts, requiring more care and attention.

Die-Cast Engines

  • Production: Introduced in 1970, die-cast engine cases became the standard for subsequent CB750 models. This process involves injecting molten metal into a metal mold, resulting in a smoother, more consistent finish.
  • Characteristics: Die-cast engines are generally considered more durable and reliable than sandcast engines. They are also easier to produce, leading to lower costs.
  • Availability: As die-cast engines represent the majority of CB750s produced, they are more readily available and typically less expensive than sandcast examples.

It's important to note that while sandcast engines are generally more desirable to collectors, both sandcast and die-cast CB750s are iconic motorcycles with their own unique appeal.

A Technological Marvel

The CB750 was a technological marvel for its time. Its inline-four engine, a configuration more commonly found in cars, delivered unprecedented power and smoothness. Coupled with an electric starter, disc brakes, and a five-speed transmission, it offered a level of refinement and performance previously unheard of in the motorcycle world.

  • The Engine: The heart of the CB750 was its 736cc inline-four engine. It produced a healthy amount of power for its time, and its smooth delivery was a stark contrast to the vibration-prone, often temperamental engines of British motorcycles that dominated the market.
  • Electric Starter: A luxury in those days, the electric starter made the CB750 accessible to a wider range of riders, eliminating the need for kickstarting.
  • Disc Brakes: Offering superior stopping power compared to drum brakes, the CB750's disc brakes were another significant advancement.
  • Six-Speed Transmission: The six-speed gearbox provided better acceleration and cruising capabilities, enhancing the overall riding experience.

A Cultural Phenomenon

The CB750 was more than just a motorcycle; it was a cultural icon. Its impact on motorcycling cannot be overstated. It sparked a new era of performance and reliability, setting the benchmark for motorcycles to come. The CB750's affordability also played a crucial role in expanding the motorcycle market, attracting a new generation of riders.

  • Performance and Handling: The CB750 offered a level of performance and handling that was unmatched by its contemporaries. It was a machine that could be ridden fast and confidently, inspiring a new generation of sport riders.
  • Affordability: Compared to the high-priced British motorcycles of the time, the CB750 was relatively affordable. This made it accessible to a wider audience, democratizing motorcycling.
  • Design: While the CB750's design was functional rather than flashy, it was clean and efficient. Its simplicity and durability have contributed to its enduring appeal.

The CB750 Riding Experience

Riding a CB750 is a unique experience. Its character is distinct from modern motorcycles. The engine's smooth delivery and the bike's relatively heavy weight contribute to a relaxed and enjoyable ride. The upright riding position is comfortable for long distances, and the bike’s stability inspires confidence.

While the CB750 may not have the razor-sharp handling of modern sportbikes, it compensates with its character and charm. The sound of the inline-four engine is a symphony of mechanical music, and the bike's overall feel is one of solidity and reliability.

Interesting Information

  • The CB750 was nicknamed the 'four-cylinder surprise' by the motorcycle press due to its unexpected performance compared to its contemporaries.
  • Honda employed a revolutionary engine manufacturing technique called 'centrifugal casting' for the CB750's crankshaft, resulting in exceptional strength and lightness.
  • The CB750 was initially designed with a shaft drive system, but it was scrapped due to cost concerns. Chain drive became the standard option.
  • Early CB750 models had a top speed of over 120 mph (190 km/h), which was astonishing for a production motorcycle in 1969.
  • A CB750 was featured in the iconic 1970 counterculture film 'Easy Rider,' further cementing its status as a symbol of freedom and rebellion.

The Enduring Legacy

Decades after its introduction, the CB750 continues to captivate riders. Its influence can be seen in countless motorcycle models that followed. The CB750 is more than just a motorcycle; it's a symbol of an era, a testament to engineering brilliance, and a timeless classic that continues to inspire and truly is a legend on two wheels.

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