These are the known mechanical and performance specifications for your 1961 Triumph T120 C Bonneville.
Basic Specs
Engine
Displacement649.00 ccm (39.60 cubic inches)
Type
DetailsTwin, four-stroke
Max RPM
Compression8.5:1
Bore/Stroke71.0 x 82.0 mm (2.8 x 3.2 inches)
Valves/Cylinder
FuelingCarburettor. Amal monobloc carburettor
IgnitionLucas K2F auto-advance Magneto
Exhaust
Lubrication
CoolingAir
Performance
Horespower46.00 HP (33.6 kW)
Torque
Top Speed185.0 km/h (115.0 mph)
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity15.14 litres (4.00 gallons)
Emissions
Chassis
Frame TypeDuplex frame
Rake
Trail
Front SuspensionTelescopic fork, hydraulic damping.
Front Travel
Rear SuspensionTwin shocks. Girlings 100 lb/ft spring tension, adjustable pre-set.
Rear Travel
SeatDual seat
Seat Height770 mm (30.3 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance127 mm (5.0 inches)
Wheelbase1,400 mm (55.1 inches)
Dry Weight178.0 kg (392.4 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre3.25-18
Rear Tire/Tyre4.00-18
Front BrakesExpanding brake (drum brake)
Front Brake Diameter203 mm (8.0 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter178 mm (7.0 inches)
Wheels
Comments
Export competition model with high-level exhaust pipes.