Technical Overview
1969 Norton Mercury 650 Technical Analysis & Specification Breakdown
Built around Norton's allround motorcycle platform, the 1969 Norton Mercury 650 pairs a 646 cc (39.4 cu in) air-cooled twin, two-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 68.0 x 89.0 mm (2.7 x 3.5 inches) with a 9.0:1 compression ratio.
Within MotoLibrary's Norton archive, this model family spans 2 indexed model years from 1968 to 1969, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Engine
Displacement 646.0 ccm (39.42 cubic inches)
Engine Type Twin, two-stroke
Engine Details Twin, two-stroke
Compression 9.0:1
Bore x Stroke 68.0 x 89.0 mm (2.7 x 3.5 inches)
Fuel System Carburettor
Ignition Coil
Cooling Air
Transmission
Final Drive Chain (final drive)
Chassis
Front Suspension Telescopic
Rear Suspension Swingarm
Wheels & Brakes
Front Brakes Expanding brake (drum brake)
Rear Brakes Expanding brake (drum brake)
Wheels Spoked
Other
Starter Kick
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Rider Profile
Who Is This Bike For?
🌍
Best For
All-Round & Adventure
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