In 1925, the company introduced the SS 100 model, which became one of the most famous and desirable motorcycles of the era. The SS 100 featured a 1000cc JAP (J. A. Prestwich Industries) V-twin engine that produced 45 horsepower, which was a considerable amount of power for a motorcycle at the time. The bike was also known for its high-quality components and attention to detail, making it a favorite of wealthy and discerning riders.
In 1926, Brough Superior introduced several improvements to the SS 100, including a new gearbox and stronger frame. The company also released the new SS 80 model, which was a lower-priced version of the SS 100 that featured an 80 horsepower JAP engine. Despite its lower power output, the SS 80 was still a fast and capable motorcycle, and it helped Brough Superior expand its customer base.
During this time, Brough Superior was known for its close relationship with T. E. Lawrence, better known as Lawrence of Arabia. Lawrence owned several Brough Superior motorcycles and was a personal friend of the company's founder, George Brough. In fact, Lawrence's fatal motorcycle accident in 1935 involved a Brough Superior.
Overall, the years 1925 and 1926 were significant for Brough Superior, as the company introduced its most famous model and continued to innovate and expand its product line.