1961 Triumph Bonneville T1 20



Triumph announced the ultimate expression of Barrra turner's 650cc pre unit twin in september 1961 ready for the 1961 season. named the bonneville in recognition of triumph's record breaking success at the salt flats of the same name, the new machine replaced the tiger 110 at the head of the sporting triumph range.

TECHNICAL SPECIFICATION
Model ID
Manufacturer (Make)Triumph
Model NameBonneville T1 20
Year1961
Category(class)Classic
Engine
Engine Capacity (Displacement)744 ccm (45.4 cubic inches)
Engine TypeTwin
Bore x StrokeØ76.0 mm x 82.0 mm (Ø2.99 inches x 3.23 inches)
Bore/Stroke Ratio0.93
Stroke4
Valves per Cylinder2
Timing SystemOHV
Cooling SystemAir
Powertrain
Gearbox5 speed
Chassis/Suspension/Brakes
Front BrakesDual disc
Rear BrakesSingle disc
Front Tire100/90-19
Rear Tire110/90-18
Dimensions
Curb Weight192 kg (423 lb)
Fuel Capacity 18 litres (4.76 gallons)
Performance
Max Power49.00 HP (35.8 kW) at 6500 RPM
Power/Weight Ratio0.26 Hp/Kg
Top Speed161 km/h (100mph)
Acceleration (dart, speedup) time
0-100 km/h5.5 seconds
0-60 mph5.2 seconds
  • 1/4 mile
  • -
  • 60 to 140 km/h, highest gear
  • -