When it comes to the world of motorcycle racing, certain machines stand out as iconic and legendary. Among them, the AJS Model E90 Porcupine holds a special place. This extraordinary motorcycle not only left an indelible mark on the racing circuit but also became a symbol of innovation and performance in the mid-20th century. In this article, we will delve into the history, specifications, and intriguing facts surrounding the AJS Model E90 Porcupine.
A Glimpse into History
The AJS Model E90 Porcupine, introduced in the late 1940s, was the brainchild of British motorcycle manufacturer AJS. This exceptional racing machine was designed to compete in the ultra-competitive world of Grand Prix motorcycle racing, and it quickly made a name for itself with its distinctive appearance and outstanding performance.
The name "Porcupine" was inspired by the unique cooling fins on its cylinder head, which resembled the quills of a porcupine. These fins were not merely a stylistic choice; they were a crucial part of the bike's design, aimed at efficiently dissipating heat generated by the high-performance engine.
Technical Specifications
The heart of the AJS Model E90 Porcupine was its 498cc, air-cooled, four-valve, DOHC (Double Overhead Cam) engine. This powerplant was a marvel of engineering in its time, producing around 40 horsepower at 7,800 RPM. Paired with a four-speed gearbox, this engine allowed the Porcupine to reach speeds of up to 140 mph, a remarkable achievement in the post-war era.
The chassis of the Porcupine was equally impressive, featuring a lightweight and rigid tubular frame that contributed to its exceptional handling. With telescopic front forks and a plunger-type rear suspension, the Porcupine was well-equipped to tackle the challenging circuits of its day.
In terms of brakes, the Porcupine sported drum brakes both front and rear, a standard for the era. However, it was the combination of its advanced engine and chassis design that set it apart from the competition.
Racing Legacy
The AJS Model E90 Porcupine achieved remarkable success on the racing circuit. In 1949, the Porcupine won the 500cc World Championship, making it one of the most sought-after racing motorcycles of its time. Notably, Les Graham, the British rider, claimed victory at the Swiss Grand Prix that year, securing the championship for AJS.
This iconic motorcycle wasn't just famous for its victories; it also became a symbol of British racing prowess and innovation in a post-war world. Its distinctive appearance and successful racing career made it an instant favorite among racing enthusiasts and fans.
The Silver Screen and Beyond
The AJS Model E90 Porcupine's fame extended beyond the racetrack. In popular culture, it made appearances in various forms of media. For instance, it was featured in several racing documentaries and films that celebrated the golden era of motorcycle racing. Its unique design and historical significance made it a natural choice for filmmakers looking to capture the essence of vintage racing.
Furthermore, the Porcupine found its way into the pages of motorcycle magazines, comic books, and even literature, where it served as a symbol of speed, technology, and adventure. It continues to be a popular subject for collectors and enthusiasts alike, with well-preserved examples fetching high prices at auctions.
In conclusion, the AJS Model E90 Porcupine stands as a testament to British engineering and racing excellence. Its distinctive design, technical innovations, and remarkable racing achievements have solidified its place in motorcycle history. From the victory podiums to the silver screen, the Porcupine's legacy endures, reminding us of a bygone era when motorcycles were more than just machines—they were symbols of human ingenuity and the pursuit of speed.
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