Cotton, The Motorcycle Masterpiece ®

1933 - Official Model Range Overview

In 1933, Cotton streamlined aspects of its range while continuing to offer lightweight and mid-capacity sporting machines.

During 1932 -1933 , Cotton maintained its commitment to proprietary engines from Villiers, JAP, and Blackburne, while focusing its engineering expertise on frame geometry and structural rigidity. The triangulated frame design continued to distinguish Cotton from many competitors who still relied on more conventional diamond-frame layouts.

Model 30/B – Blackburne 250cc OHV

This model featured a 250cc Blackburne engine, combining reliable performance with Cotton’s rigid and lightweight chassis design.

Model 6/B – Blackburne 250cc OHV

A Blackburne-powered lightweight variant designed for steady performance and excellent road holding in everyday riding conditions.

Model 1/V – Villiers 148cc Two-Stroke

A lightweight and economical motorcycle fitted with a 148cc Villiers two-stroke engine. Designed for daily transport and new riders, it retained Cotton’s superior frame rigidity.

Model 2/V – Villiers 246cc Two-Stroke

A mid-capacity two-stroke offering increased power while remaining economical and easy to maintain.

Model 1/B – Blackburne 150cc Sloper

A compact model featuring an inclined (“sloper”) Blackburne engine, improving weight distribution and lowering the centre of gravity.

Model 1/J – JAP 150cc Sloper

Similar in concept to the Blackburne version but powered by a JAP engine. The sloped engine layout enhanced stability and handling precision.

Model 2/J – JAP 250cc Sloper

A 250cc inclined-engine model providing improved performance while maintaining balanced handling characteristics.

Model 2/JC – JAP 250cc Sloper (Competition Specification)

A sport-oriented variant of the 250cc sloper model, likely featuring higher compression or competition tuning.

Model 7/J – JAP 350cc Sloper Super

A more powerful sloper configuration with a 350cc JAP engine. Designed for sporting riders seeking stronger performance.

Model 8/J – JAP 500cc Sloper Super

The largest of the sloper series, powered by a 500cc JAP engine. It combined high output with Cotton’s characteristic chassis stability.

Source: Olympia Show
The Olympia Show was one of the most important motor and motorcycle exhibitions in Britain during the early 20th century. Held annually in London, it was the main event where manufacturers officially presented new models, technical innovations, and racing machines to the public, the press, and the industry.

Source: The Motor Cycle
The Motor Cycle was a leading British motorcycle magazine and one of the most authoritative publications of its time. Its reports, road tests, and show reviews are today considered valuable historical documents, widely used by historians and collectors as reliable primary sources on early motorcycle development.

Source: Motor Sport Magazine

Motor Sport is one of the world’s oldest and most respected motor racing publications, founded in the United Kingdom in 1924. Its contemporary reports, show reviews, and technical commentary are regarded as reliable primary historical sources, widely used by historians, collectors, and researchers to document the development of early motorcycles and motor sport.

Source: Official Cotton Motor Company catalogues and factory brochures.
Source: The Motor Cycle (United Kingdom)
Source: Motor Cycling (United Kingdom)
Source: Technical data concerning JAP, Blackburne, Villiers, Rudge Python, and Sturmey-Archer engines has been derived from:

- Period manufacturer literature

- Trade publications of the era

- Surviving engineering documentation and historical registries

Source: cybermotorcyle

Cotton, The Motorcycle Masterpiece ®

1933 - Official Model Range Overview

Model 1/V – Villiers 148cc Two-Stroke

Model 2/V – Villiers 250cc Two-Stroke

Model 6/J – JAP 250cc OHV

Model 9/J – JAP 350cc OHV

Model 25/J – JAP 500cc OHV

Model 29/B – Blackburne 350cc OHV

1934 - Official Model Range Overview

Model 9/J – JAP 350cc OHV

Model 9/B – Blackburne 350cc OHV

Model 25/J – JAP 500cc OHV

Model 29/RP – Rudge Python 350cc 4-Valve

Model 25/RP – Rudge Python 500cc 4-Valve

Model 29/B – Blackburne 350cc 2-Port

Model 25/B – Blackburne 500cc 2-Port

Model 25/SA – Sturmey-Archer 500cc 2-Port

Model 6/J – JAP 250cc OHV

Model 30/J – JAP 250cc OHV

Model 30/B – Blackburne 250cc OHV

Model 6/B – Blackburne 250cc OHV

Model 1/V – Villiers 148cc Two-Stroke

Model 2/V – Villiers 246cc Two-Stroke

Model 1/B – Blackburne 150cc Sloper

Model 1/J – JAP 150cc Sloper

Model 2/J – JAP 250cc Sloper

Model 2/JC – JAP 250cc Sloper (Competition Specification)

Model 7/J – JAP 350cc Sloper Super

Model 8/J – JAP 500cc Sloper Super

Cotton, The Motorcycle Masterpiece ®

1933 - Official Model Range Overview

Model 1/V – Villiers 148cc Two-Stroke

Model 2/V – Villiers 250cc Two-Stroke

Model 6/J – JAP 250cc OHV

Model 9/J – JAP 350cc OHV

Model 25/J – JAP 500cc OHV

Model 29/B – Blackburne 350cc OHV

1934 - Official Model Range Overview

Model 9/J – JAP 350cc OHV

Model 9/B – Blackburne 350cc OHV

Model 25/J – JAP 500cc OHV

Model 29/RP – Rudge Python 350cc 4-Valve

Model 25/RP – Rudge Python 500cc 4-Valve

Model 29/B – Blackburne 350cc 2-Port

Model 25/B – Blackburne 500cc 2-Port

Model 25/SA – Sturmey-Archer 500cc 2-Port

Model 6/J – JAP 250cc OHV

Model 30/J – JAP 250cc OHV

Model 30/B – Blackburne 250cc OHV

Model 6/B – Blackburne 250cc OHV

Model 1/V – Villiers 148cc Two-Stroke

Model 2/V – Villiers 246cc Two-Stroke

Model 1/B – Blackburne 150cc Sloper

Model 1/J – JAP 150cc Sloper

Model 2/J – JAP 250cc Sloper

Model 2/JC – JAP 250cc Sloper (Competition Specification)

Model 7/J – JAP 350cc Sloper Super

Model 8/J – JAP 500cc Sloper Super

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