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Allround · 1951

Model 16 350MS

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MotoLibrary Score
36 /100 Commuter
Power/Weight
0.11 hp/kg
Engine
347 ccm

1951 AJS Model 16 350MS Technical Analysis & Specification Breakdown

At the heart of the 1951 AJS Model 16 350MS allround motorcycle, AJS pairs a 347 cc (21.2 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 18 HP (13.1 kW) at 5,750 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 51.9 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the Model 16 350MS measures 170 kg (375 lbs) dry, translating to a power-to-weight ratio of 0.11 HP/kg (9.44 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,422 mm (56 in) wheelbase engineered for balanced agility and highway composure. The 13.5-liter (3.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's AJS archive, this model family spans 19 indexed model years from 1949 to 1967, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.

Specific Output
51.9 HP/L
Power-to-Weight
0.11 HP/kg (9.44 kg/HP)
Engine
Displacement 347.0 ccm (21.17 cubic inches)
Engine Type Single cylinder, four-stroke
Engine Details Single cylinder, four-stroke
Power 18.0 HP (13.1 kW)) @ 5750 RPM
Compression 6.5:1
Bore x Stroke 69.0 x 93.0 mm (2.7 x 3.7 inches)
Fuel System Carburettor
Fuel Control Overhead Valves (OHV)
Ignition Bobine
Lubrication Wet sump
Cooling Air
Transmission
Gearbox 4-speed
Final Drive Chain (final drive)
Clutch Wet multiplate
Chassis
Frame Type Duplex steel cradle
Front Suspension Catrigde
Rear Suspension Rigid
Wheelbase 1422 mm (56.0 inches)
Wheels & Brakes
Front Tyre 3.25-19
Rear Tyre 3.25-19
Front Brakes Expanding brake (drum brake)
Rear Brakes Expanding brake (drum brake)
Dimensions & Weight
Dry Weight 170.0 kg (374.8 pounds)
Power/Weight 0.1059 HP/kg
Overall Length 2190 mm (86.2 inches)
Overall Width 710 mm (28.0 inches)
Fuel Capacity 13.50 litres (3.57 US gallons)
Other
Starter Kick
More from AJS
Buying Checklist

Before You Compare This Bike

Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.

Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
Rider Profile

Who Is This Bike For?

🟢
Beginner
A2 license compatible, manageable power.
🌍
Best For
All-Round & Adventure
⚖️
Handling
Manageable weight for most riders
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