Sunbeam Model 1

Sunbeam model 1

English Sunbeam has roots as far back as 1790, but the first motorcycle was not built until 1912. The brand made fairly traditional motorcycles for several decades, and took several victories in the Senior TT on the Isle of Man, among other things.

The 1925 Sunbeam Model 1 was built in Wolverhampton, and was a typical machine of its time. Later, Sunbeam would become known for producing slightly more unconventional models, such as the S7 and S8. These were designed by Erling Poppe, and used 2-cylinder engines placed longitudinally in the frame, and with a shaft drive to the rear wheel.

What's special about the 1925 model year is that Sunbeam now had drum brakes on its entire model range.

2.75 hp

The Model 1 was still a relatively simple and conservative motorcycle with a side-valve engine. At the same time, Sunbeam began to offer more advanced OHV models and, not least, racing machines that left their mark on the Isle of Man.

Sunbeam had a very good reputation for high build quality and finish. Sunbeam changed hands several times, including being sold to Imperial Chemical Industries (ICI) in 1922, to Associated Motor Cycle (AMC) in 1937 and last but not least to BSA in 1943. The last motorcycle to carry Sunbeam logo was produced in 1957.

• Technical data: Sunbeam Model 1, 1925 model:
• Engine: 1-cylinder, 4-stroke, side-ventilated (SV)
• Displacement: 347 cm³
• Power: approx. 2.75 hp
• Gearbox: 3-speed
• Start: kickstart
• Front tire: 26 x 2 1/2
• Rear tire: 26 x 2 1/2
• Frame: single tube frame
• Brakes: drum brakes front and rear
• Weight: 100 kg