Allround · 1955
MK2 Square Four
Technical Overview
1955 Ariel MK2 Square Four Technical Analysis & Specification Breakdown
Positioned in Ariel's allround motorcycle lineup, the 1955 Ariel MK2 Square Four pairs a 997 cc (60.8 cu in) single cylinder, four-stroke architecture with road-focused gearing.
Rider ergonomics and chassis geometry center around a 1,422 mm (56 in) wheelbase engineered for balanced agility and highway composure. The 23-liter (6.1 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Ariel archive, this model family spans 6 indexed model years from 1954 to 1959, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Engine
Displacement 997.0 ccm (60.84 cubic inches)
Engine Type Single cylinder, four-stroke
Engine Details Single cylinder, four-stroke
Fuel System Carburettor
Fuel Control Overhead Valves (OHV)
Transmission
Final Drive Chain (final drive)
Chassis
Frame Type Tubular single loop
Wheelbase 1422 mm (56.0 inches)
Wheels & Brakes
Front Tyre 3.25-19
Rear Tyre 4-18
Front Brakes Expanding brake (drum brake)
Rear Brakes Expanding brake (drum brake)
Wheels Spoked
Dimensions & Weight
Overall Length 2100 mm (82.7 inches)
Fuel Capacity 23.00 litres (6.08 US gallons)
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Rider Profile
Who Is This Bike For?
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All-Round & Adventure
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