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Silk 700 S Sabre Mk 2
1979
1979
The 1979 Silk 700 S Sabre Mk 2 arrived at a fascinating juncture for British motorcycle manufacturers, representing a continued effort to offer a distinctive, lightweight, and powerful alternative in a market increasingly dominated by Japanese four-strokes. Building upon the legacy of earlier Silk models, the Sabre Mk 2 aimed to refine its unique two-stroke formula for a discerning rider. In its competitive landscape, it faced off against models like the Suzuki GT550 and Kawasaki KH500, both offering multi-cylinder two-stroke propulsion, albeit with different design philosophies.
At the heart of the Sabre Mk 2 was its 653.0 ccm (39.85 cubic inches) twin, two-stroke engine. This unit produced a respectable 54.0 HP (39.4 kW) at 6000 RPM, a figure that, combined with its exceptionally light 140.0 kg (308.6 pounds) dry weight, promised brisk acceleration. The power-to-weight ratio contributed to a top speed of 177.0 km/h (110.0 mph), making it a genuinely fast machine for its era and displacement. This was a motorcycle designed to capitalize on the two-stroke's inherent punchiness, delivering its power in a characteristically immediate fashion.
Riding characteristics of the Sabre Mk 2 would have been defined by its minimalist design and powerful engine. The light weight would have contributed to agile handling, making it responsive to rider inputs. Its relatively compact dimensions and likely slightly forward-biased ergonomics would have encouraged a more engaged riding posture, suitable for spirited road use. While not a touring machine, its simplicity and directness would have appealed to those who valued unadulterated motorcycling. Comfort, typical of such lightweight and performance-oriented machines of the late 70s, would have been secondary to the dynamic experience.
The Silk 700 S Sabre Mk 2 was aimed squarely at the experienced rider who appreciated the distinct characteristics of a high-performance two-stroke and valued lightweight British engineering. It was not a motorcycle for the masses but rather for the enthusiast seeking a nimble and potent machine with a unique engine note and power delivery. Its focus on performance and raw riding experience solidified its place as a niche, yet highly regarded, machine from a period of significant transition in the motorcycle industry.
✅ Why buy this bike?
• Reliable and proven air-cooled parallel twin engine design, known for longevity and ease of maintenance. • Comfortable, upright riding position suited for touring or daily commuting, reducing rider fatigue on longer journeys. • Good low-end torque from the 653cc engine, making it tractable in city traffic and enjoyable on country roads. • Classic late-70s British styling, appealing to vintage enthusiasts and offering a distinctive look. • Relatively simple mechanicals mean easier DIY repairs and lower workshop costs compared to more complex machines.⚠️ Things to consider
• Vibrations from the parallel twin engine can become noticeable at higher RPMs, affecting long-distance comfort. • Braking performance, typically a single front disc and rear drum, is adequate but not up to modern standards. • Limited parts availability for specific Sabre Mk 2 components can make restoration or certain repairs challenging. • Original suspension technology is basic, offering less refinement and adjustability than contemporary bikes. • Fuel economy might not be stellar compared to smaller, more modern motorcycles, especially with spirited riding.With 54 HP, requires full Class A license. Riders must be 24+ or have 2 years A2 experience (20+).
Estimated average for 653cc class: 35-50 mpg (5.0-7.0 L/100km)
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