Simplex Automatic 1957 - Specifications & Review

Introducing the 1957 Simplex Automatic Motorcycle

The 1957 Simplex Automatic motorcycle stands out in the world of vintage bikes as a unique allrounder, designed for both commuting and leisurely rides. With a reputation for its simplicity and practicality, this motorcycle was aimed at riders who valued efficiency and ease of use over raw power. Its lightweight construction and approachable design made it an accessible choice for new riders, while also providing seasoned enthusiasts with a charming retro alternative. The Simplex Automatic represents a notable chapter in American motorcycling history, combining innovative engineering with an unmistakable mid-century aesthetic.

Engine Performance and Riding Characteristics

At the heart of the Simplex Automatic is its spirited single-cylinder, two-stroke engine, boasting a displacement of 130.00 ccm. With a power output of 4.00 HP at a smooth 5000 RPM, the motorcycle offers a surprisingly lively ride, particularly suited for urban environments. The engine's 6.5:1 compression ratio, combined with a carburettor fuel system and magneto ignition, ensures reliable starts and efficient fuel consumption. The variable speed automatic clutch provides a seamless riding experience, allowing riders to focus on the road without the hassle of manual gear changes. With a power-to-weight ratio of 0.0653 HP/kg and a total weight of just 61.2 kg, the Simplex Automatic is nimble and responsive, making it perfect for zipping through city traffic or exploring winding country roads.

Key Features and Technology

The 1957 Simplex Automatic incorporates several notable features that enhance both its performance and rider comfort. The leading link front suspension offers a stable and smooth ride, absorbing bumps and imperfections in the road for a more enjoyable journey. Meanwhile, the rigid rear suspension contributes to the motorcycle's straightforward design and lightweight nature. The expanding drum brake setup ensures reliable stopping power, a crucial feature for safety in daily riding. With a fuel capacity of 9.46 litres (2.50 gallons), riders can expect decent range, making this vintage gem not only charming but also practical for day-to-day use.

Pros and Cons

Pros:

1. Lightweight and Nimble: At only 61.2 kg, the Simplex Automatic is easy to handle, making it ideal for new riders and urban commuting.
2. Innovative Automatic Clutch: The variable speed automatic clutch simplifies the riding experience, allowing for smooth acceleration without the need for manual shifting.
3. Classic Aesthetic: With its retro design, the Simplex Automatic is a head-turner, perfect for enthusiasts looking to own a slice of motorcycling history.

Cons:

1. Limited Power Output: The 4.00 HP engine may not satisfy those seeking high-speed thrills or aggressive performance.
2. Rigid Rear Suspension: While simple in design, the rigid rear can lead to a less comfortable ride over rough terrain.
3. Availability of Parts: As a vintage motorcycle, sourcing replacement parts could pose a challenge for restoration and maintenance.

In summary, the 1957 Simplex Automatic motorcycle is a nostalgic nod to a simpler time in motorcycling, offering charm and practicality in equal measure. Whether you're a collector or a casual rider, this motorcycle is sure to make a statement and provide a unique riding experience.