Positioned in Yamaha's classic motorcycle lineup, the 1973 Yamaha TX 500 features a 500 cc (30.5 cu in) air-cooled twin, four-stroke configuration. In factory specification, peak output is rated at 50 HP (36.5 kW) at 9,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 100 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the TX 500 measures 192.8 kg (425 lbs) dry, translating to a power-to-weight ratio of 0.26 HP/kg (3.86 kg per horsepower). The 15.14-liter (4 US gal) fuel tank paired with a rated consumption of 6.72 L/100 km provides an estimated theoretical range of roughly 225 km (140 miles) between fill-ups, while factory top speed is listed at 177 km/h (110 mph).
Specific Output
100 HP/L
Power-to-Weight
0.26 HP/kg (3.86 kg/HP)
Theoretical Range
~225 km (140 mi)
Engine
Displacement500.0 ccm (30.51 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power50.0 HP (36.5 kW)) @ 9000 RPM
Compression10.0:1
Valves/Cylinder4
Fuel SystemCarburettor. 2 Keihin
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
LubricationWet sump
CoolingAir
Max RPM9000
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet Plate
Performance
Top Speed177.0 km/h (110.0 mph)
Fuel Consumption6.72 litres/100 km (14.9 km/l or 35.00 mpg)
Greenhouse Gases155.9 CO2 g/km. (CO2 - Carbon dioxide emission)
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Power
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Weight
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Fuel Capacity
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Brakes
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Suspension
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Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.