These are the known mechanical and performance specifications for your 1957 Velocette Mac .
Basic Specs
Engine
Displacement349.00 ccm (21.30 cubic inches)
Type
DetailsTwin, four-stroke
Max RPM
Compression
Bore/Stroke68.0 x 96.0 mm (2.7 x 3.8 inches)
Valves/Cylinder
FuelingCarburettor
Ignition
Exhaust
Lubrication
CoolingAir
Chassis
Frame Type
Rake
Trail
Front Suspension
Front Travel
Rear Suspension
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance
Wheelbase
Dry Weight161.0 kg (354.9 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre3.25-19
Rear Tire/Tyre3.50-19
Front BrakesExpanding brake (drum brake)
Front Brake Diameter178 mm (7.0 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter152 mm (6.0 inches)
Wheels
Comments