AJS Model 8 350 - Specifications & Review

Model 8 350

Article Complete Info

Articleid512553
CategorySport
MakeAJS
ModelModel 8 350
Year1963

Chassis, Suspension, Brakes & Wheels

FrontbrakesExpanding brake (drum brake)
FrontsuspensionTelescopic
Fronttyre3.25-18
RearbrakesExpanding brake (drum brake)
RearsuspensionSwingarm-two shocks
Reartyre3.25-18
SeatDual
WheelsSpoked

Engine & Transmission

Borexstroke72.0 x 82.5 mm (2.8 x 3.2 inches)
Compression7.5:1
CoolingsystemAir
Displacement348.00 ccm (21.23 cubic inches)
EnginedetailsSingle cylinder, four-stroke
FuelsystemCarburettor
LubricationsystemWet sump
Power21.00 HP (15.3 kW)) @ 6250 RPM
TransmissiontypefinaldriveChain

Other Specifications

StarterKick

Physical Measures & Capacities

Dryweight153.0 kg (337.3 pounds)
Fuelcapacity12.50 litres (3.30 gallons)
Powerweightratio0.1373 HP/kg

About AJS

Country of Origin: United Kingdom
Founder: Stevens brothers (Albert John Stevens et al.)
Best Known For: Pre/post-war British racers (7R ‘Boy Racer’, Porcupine E90/95) and classic singles

Company History

AJS traces to Wolverhampton, where the Stevens brothers built precise, reliable singles that quickly earned podiums on the Isle of Man and in British trials. The initials honor Albert John Stevens, but the company’s identity is collective: meticulous family engineering that prized strong crankcases, effective lubrication, and stout frames. Between the wars AJS titles and speed records made the black-and-gold tank a byword for competence. Corporate reshuffling saw AJS absorbed into Associated Motor Cycles (AMC) alongside Matchless; engineering cross-pollinated, and racing continued with the exquisite 7R ‘Boy Racer’—a jewel of a DOHC 350 that taught generations how a well-sorted single should feel. The Porcupine E90/E95 twin, bristling with cooling fins, became legend for its rarity and world championship pedigree. Post-war commuter machines carried the badge into daily life, but car ownership and global competition squeezed the British industry; production ultimately ceased, with the name later licensed for small-series machines. Historically, AJS stands for the golden mean of British motorcycling: elegant but purposeful design, road manners honed by competition, and a parts culture that kept bikes alive for decades. To ride a tidy AJS today is to experience clear, communicative steering and a mechanical cadence that made British singles beloved across continents.

Other Years

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