Engineered by Triumph for the touring motorcycle segment, the 1971 Triumph TR 6 R Tiger 650 relies on a 649 cc (39.6 cu in) air-cooled twin, four-stroke powerplant. In factory specification, peak output is rated at 48 HP (35 kW) at 7,250 rpm while maximum torque reaches 50.1 Nm (37 lb-ft), transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 74 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the TR 6 R Tiger 650 measures 191 kg (421 lbs) wet (curb), translating to a power-to-weight ratio of 0.25 HP/kg (3.98 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,420 mm (55.9 in) wheelbase engineered for balanced agility and highway composure. The 13.25-liter (3.5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 167 km/h (104 mph).
Within MotoLibrary's Triumph archive, this model family spans 2 indexed model years from 1971 to 1972, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
74 HP/L
Power-to-Weight
0.25 HP/kg (3.98 kg/HP)
Engine
Displacement649.0 ccm (39.60 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power48.0 HP (35.0 kW)) @ 7250 RPM
Torque50.1 Nm (5.1 kgf-m or 37.0 ft.lbs)
Compression9.0:1
Bore x Stroke71.0 x 82.0 mm (2.8 x 3.2 inches)
Valves/Cylinder2
Fuel SystemCarburettor
Fuel ControlOverhead Valves (OHV)
Ignition12V Battery and coil, Lucas
CoolingAir
Transmission
Gearbox4-speed
Final DriveChain (final drive)
Performance
Top Speed167.0 km/h (103.8 mph)
Chassis
Front SuspensionTelescopic fork, 2-way hydraulic damping
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
