Sunbeam S7 500 1955 - Specifications & Review

S7 500

Article Complete Info

Articleid789128
CategorySport touring
MakeSunbeam
ModelS7 500
Year1955

Chassis, Suspension, Brakes & Wheels

FrametypeTwin cradle
FrontbrakesExpanding brake (drum brake)
FrontsuspensionTelescopic
Fronttyre4.50-16
RearbrakesExpanding brake (drum brake)
RearsuspensionPlungers
Reartyre4.50-16
SeatSingle
WheelsSpoked

Engine & Transmission

Borexstroke70.0 x 63.5 mm (2.8 x 2.5 inches)
ClutchDry singleplate
Compression6.5:1
CoolingsystemOil & air
Displacement487.00 ccm (29.72 cubic inches)
EnginedetailsTwin, four-stroke
FuelsystemCarburettor
LubricationsystemWet sump
Power24.00 HP (17.5 kW)) @ 5800 RPM
Topspeed121.0 km/h (75.2 mph)
TransmissiontypefinaldriveShaft drive (cardan)

Other Specifications

ColoroptionsBlack/ green
StarterKick

Physical Measures & Capacities

Dryweight194.0 kg (427.7 pounds)
Powerweightratio0.1237 HP/kg

About Sunbeam S7 500 1955

The 1955 Sunbeam S7 500 stands as a distinguished figure in the sport touring category, elegantly bridging the gap between classic style and reliable performance. With its roots planted firmly in the rich heritage of British motorcycle engineering, the S7 is not just a means of transport; it’s a testament to the golden age of motorcycling. Designed for the discerning rider who appreciates both aesthetics and functionality, the S7 500 offers a unique blend of vintage charm and contemporary touring capabilities, making it a coveted piece for collectors and enthusiasts alike.

At the heart of the Sunbeam S7 500 is a robust 487cc twin-cylinder, four-stroke engine that produces 24 horsepower at 5800 RPM, delivering a spirited performance on the open road. With a compression ratio of 6.5:1 and a top speed of 121 km/h (75.2 mph), this motorcycle provides an exhilarating riding experience, whether you're cruising through city streets or embarking on a weekend getaway. The oil and air-cooled engine, combined with a smooth shaft drive, ensures a responsive and efficient power delivery, allowing riders to enjoy the road with confidence. The telescopic front suspension and plungers at the rear offer a comfortable ride, absorbing bumps and providing stability during long journeys.

Beyond its impressive performance, the S7 500 is equipped with features that enhance both usability and style. The classic twin cradle frame not only adds to its aesthetic appeal but also contributes to its overall stability and handling. With expanding drum brakes at both the front and rear, riders can expect reliable stopping power, even on descent. The kick starter adds a nostalgic touch, and the elegant color options of black and green evoke the timeless design ethos of mid-century motorcycles. The S7 500 is more than just a bike; it’s a piece of history that continues to inspire today’s riders.

Pros:

  1. Timeless Design: The classic aesthetics make it a head-turner, perfect for showing off at vintage motorcycle events.
  2. Smooth Ride: The combination of a well-engineered suspension system and shaft drive provides a comfortable ride over various terrains.
  3. Reliable Performance: With a solid engine and dependable braking system, the S7 500 is suited for both city commuting and longer touring adventures.

Cons:

  1. Weight: At 194 kg (427.7 pounds), it may feel heavier compared to modern motorcycles, which could be a consideration for newer riders.
  2. Limited Power: While 24 HP is adequate for casual riding, it may not satisfy those looking for high-performance thrills.
  3. Kick Start Only: The absence of an electric starter may deter some riders who prefer the convenience of modern starting technology.

In conclusion, the 1955 Sunbeam S7 500 is a classic motorcycle that encapsulates the spirit of adventure and the joy of riding, making it a valuable addition to any enthusiast's collection.

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