These are the known mechanical and performance specifications for your 1964 Matchless G-12.
Basic Specs
Engine
Displacement646.00 ccm (39.42 cubic inches)
Type
DetailsTwin, four-stroke
Max RPM
Compression
Bore/Stroke
Valves/Cylinder
FuelingCarburettor. Amal
Ignition
Exhaust
Lubrication
CoolingAir
Chassis
Frame Type
Rake
Trail
Front SuspensionTelescopic
Front Travel
Rear SuspensionSwingarm with coil-over shocks
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance
Wheelbase
Dry Weight180.0 kg (396.8 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre
Rear Tire/Tyre
Front BrakesExpanding brake (drum brake)
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
Wheels
Comments
Designer was Phil Walker