Simplex Automatic 1947 - Specifications & Review

Introducing the 1947 Simplex Automatic: A Classic Gem of American Motorcycling

The 1947 Simplex Automatic stands as a unique piece of American motorcycle history, captivating enthusiasts with its distinctive design and practical functionality. Positioned in the all-round category, this motorcycle was designed for riders seeking a versatile and reliable machine. With its lightweight frame and approachable power, the Simplex Automatic appealed to both novice and experienced riders alike, making it a popular choice in the post-war era when mobility was paramount. As a symbol of innovation, it showcased the adaptability of American engineering to meet the demands of everyday transport.

Engine Performance and Riding Characteristics

At the heart of the Simplex Automatic is a spirited single-cylinder, two-stroke engine that displaces 130 cc (7.93 cubic inches) and delivers a modest but lively 4 HP at 4000 RPM. With a compression ratio of 6.5:1, this engine offers a responsive ride, especially suited for urban commuting and leisurely jaunts. The unique belt final drive ensures smooth power transitions, while the dual spark plug ignition system enhances reliability and performance. Riders will appreciate the simplicity and ease of operation, which allows for a relaxed riding experience, making it perfect for those looking to enjoy the open road without the complexities of high-performance machinery.

Key Features and Technology

The 1947 Simplex Automatic is not just about power; it also features a robust duplex loop frame that ensures stability and confidence during rides. The front suspension employs short rocker arms paired with two coil springs, providing a comfortable ride over uneven surfaces, while the rigid rear suspension design emphasizes the motorcycle's straightforward engineering. Weighing in at just 61.2 kg (135 pounds), the Simplex is incredibly lightweight, enhancing its agility and maneuverability. It boasts a fuel capacity of 9.46 liters (2.50 gallons), ensuring that riders can enjoy longer journeys without frequent stops at the pump. The classic design, paired with practical features, makes the Simplex Automatic a must-have for those who appreciate vintage motorcycles.

Pros and Cons

Pros:

1. Lightweight and Maneuverable: At only 61.2 kg, the Simplex Automatic is easy to handle, making it ideal for both new riders and urban commuting.
2. Simplicity of Operation: The two-stroke engine and belt drive system provide a straightforward riding experience, requiring minimal maintenance and offering reliable performance.
3. Unique Vintage Appeal: With its classic styling and historical significance, this motorcycle attracts attention and admiration from enthusiasts and collectors alike.

Cons:

1. Limited Power Output: With just 4 HP, the Simplex is not designed for high-speed performance, which may limit its appeal to those seeking thrill and speed.
2. Rigid Rear Suspension: While contributing to simplicity, the rigid rear suspension may result in a less comfortable ride over rough terrain compared to modern motorcycles.
3. Basic Technology: As a product of its time, the lack of advanced features and technology may not meet the expectations of riders accustomed to modern conveniences.

In summary, the 1947 Simplex Automatic is a charming blend of simplicity, reliability, and vintage allure, making it a delightful choice for motorcycle enthusiasts and collectors alike. It embodies an era of motorcycling that prioritized practicality and accessibility, ensuring its place in the hearts of those who appreciate classic machines.