Matchless G12 - Specifications & Review

G12

Article Complete Info

Articleid815695
CategorySport
MakeMatchless
ModelG12
Year1966

Chassis, Suspension, Brakes & Wheels

FrontbrakesExpanding brake (drum brake)
FrontsuspensionTelescopic
RearbrakesExpanding brake (drum brake)
RearsuspensionSwingarm with coil-over shocks

Engine & Transmission

Displacement646.00 ccm (39.42 cubic inches)
EnginedetailsTwin, four-stroke
FuelsystemCarburettor. Amal
Power35.00 HP (25.5 kW)) @ 6500 RPM
TransmissiontypefinaldriveChain

Other Specifications

CommentsDesigner was Phil Walker

Physical Measures & Capacities

Dryweight180.0 kg (396.8 pounds)
Powerweightratio0.1944 HP/kg

About Matchless

Country of Origin: United Kingdom
Founder: Henry Herbert Collier and sons
Best Known For: Pre- and post-war singles/twins; Isle of Man TT success; later AMC era

Company History

Matchless helped define British motorcycling’s formative decades, from TT victories in the 1900s to post-war roadsters that carried workers and soldiers home. The brand’s G80 singles and G9/G12 twins paired dignified styling with tractable performance, while the AMC era saw platform sharing with AJS and cooperative dealer networks. As Japanese reliability and performance surged in the 1960s, AMC faltered and the marque faded, but its machines remain prized for mechanical clarity and period grace—magnetos, primary chains, and alloy cases you can read with your hands. Modern revival attempts have focused on fashion and limited customs, yet the core identity persists in vintage clubs and restored iron: purposeful motorcycles that reward smoothness and maintenance rituals. Historically, Matchless is a pillar—part of the grammar from which later roadsters and scramblers learned proportion, sound, and the pleasure of an engine that speaks through the bars.

Other Years

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