Sunbeam S7 500 1947 - Specifications & Review
Article Complete Info
| Articleid | 561148 |
|---|---|
| Category | Sport touring |
| Make | Sunbeam |
| Model | S7 500 |
| Year | 1947 |
Chassis, Suspension, Brakes & Wheels
| Frametype | Twin cradle |
|---|---|
| Frontbrakes | Expanding brake (drum brake) |
| Frontbrakesdiameter | 200 mm (7.9 inches) |
| Frontsuspension | Telescopic |
| Fronttyre | 4.50-16 |
| Rearbrakes | Expanding brake (drum brake) |
| Rearbrakesdiameter | 200 mm (7.9 inches) |
| Rearsuspension | Plungers |
| Reartyre | 4.50-16 |
| Seat | Single |
| Wheels | Spoked |
Engine & Transmission
| Borexstroke | 70.0 x 63.5 mm (2.8 x 2.5 inches) |
|---|---|
| Clutch | Dry singleplate |
| Compression | 6.5:1 |
| Coolingsystem | Oil & air |
| Displacement | 487.00 ccm (29.72 cubic inches) |
| Enginedetails | Twin, four-stroke |
| Fuelsystem | Carburettor |
| Lubricationsystem | Wet sump |
| Power | 24.00 HP (17.5 kW)) @ 5800 RPM |
| Topspeed | 121.0 km/h (75.2 mph) |
| Transmissiontypefinaldrive | Shaft drive (cardan) |
Other Specifications
| Coloroptions | Black/ green |
|---|---|
| Starter | Kick |
Physical Measures & Capacities
| Dryweight | 194.0 kg (427.7 pounds) |
|---|---|
| Powerweightratio | 0.1237 HP/kg |
About Sunbeam S7 500 1947
Introducing the 1947 Sunbeam S7 500: A Classic Sport Touring Icon
Step back into the post-war era of motorcycling with the 1947 Sunbeam S7 500, a motorcycle that perfectly captures the spirit of innovation and elegance. Positioned within the sport touring category, the S7 was designed for riders who craved adventure without sacrificing comfort. With its sophisticated design and robust engineering, this bike is a testament to Sunbeam's commitment to quality and performance, making it a beloved choice for motorcycle enthusiasts and collectors alike.
Engine Performance and Riding Characteristics
Under the sleek exterior of the S7 lies a powerful 487cc twin-cylinder, four-stroke engine, delivering a respectable 24 horsepower at 5800 RPM. With a compression ratio of 6.5:1, the engine provides a satisfying blend of power and efficiency, allowing riders to reach a top speed of 121 km/h (75.2 mph). The oil and air cooling system ensures the engine maintains optimal performance during long rides, while the dry single-plate clutch offers smooth engagement. The shaft drive provides a seamless transfer of power to the rear wheel, enhancing the bike's stability and making it a joy to ride on both winding roads and straightaways.
Key Features and Technology
The S7 is not just about performance; it also showcases a host of features that enhance the riding experience. The twin cradle frame and telescopic front suspension deliver a balanced and comfortable ride, while the rear plungers provide excellent shock absorption. With expanding drum brakes measuring 200 mm at both the front and rear, riders can count on reliable stopping power. The iconic design is available in classic black and green color options, ensuring that the S7 turns heads wherever it goes. As a nod to its heritage, the motorcycle features a traditional kick starter, marrying nostalgia with functionality.
Pros and Cons
Pros:
- Elegant Design: The S7's classic aesthetic is a standout, making it a visually appealing choice for vintage motorcycle lovers.
- Comfortable Ride: With its sport touring layout and effective suspension, the S7 offers a comfortable experience for long-distance riding.
- Reliable Performance: The robust engine and shaft drive ensure dependable performance, making it suitable for various riding conditions.
Cons:
- Weight: At 194 kg (427.7 pounds), the S7 may feel heavy for some riders, particularly when maneuvering at low speeds.
- Limited Power: While adequate for cruising, the 24 HP may not satisfy those seeking thrilling acceleration or high-speed capabilities.
- Kick Start Only: The traditional kick starter may be less convenient for modern riders accustomed to electric start systems.
In summary, the 1947 Sunbeam S7 500 is a beautiful blend of heritage, performance, and comfort. It stands as a remarkable piece of motorcycle history, appealing to enthusiasts who appreciate both its engineering and aesthetic charm.