At the heart of the 1978 Silk 700S Sabre Mk2 allround motorcycle, Silk pairs a 653 cc (39.9 cu in) liquid-cooled twin, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 54 HP (39.4 kW) at 6,000 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 82.7 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the 700S Sabre Mk2 measures 140 kg (309 lbs) dry, translating to a power-to-weight ratio of 0.39 HP/kg (2.59 kg per horsepower).
Within MotoLibrary's Silk archive, this model family spans 2 indexed model years from 1978 to 1979, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
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.
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.
