Built around Yamaha's sport motorcycle platform, the 1982 Yamaha RD 80 LC utilizes a 79 cc (4.8 cu in) oil & air-cooled single cylinder, two-stroke layout. In factory specification, peak output is rated at 10 HP (7.3 kW) at 8,500 rpm while maximum torque reaches 9.4 Nm (6.9 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 126.6 HP per liter and a 2,500 rpm working window between peak torque (6,000 rpm) and peak power (8,500 rpm), 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 RD 80 LC measures 78 kg (172 lbs) dry, translating to a power-to-weight ratio of 0.13 HP/kg (7.8 kg per horsepower). Rider ergonomics and chassis geometry center around a 765 mm (30.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,230 mm (48.4 in) wheelbase engineered for quick, flickable steering geometry. The 10-liter (2.6 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 129 km/h (80 mph).
Specific Output
126.6 HP/L
Power-to-Weight
0.13 HP/kg (7.8 kg/HP)
Power Band Window
6,000–8,500 rpm
Standover Height
765 mm (30.1 in)
Engine
Displacement79.0 ccm (4.82 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power10.0 HP (7.3 kW)) @ 8500 RPM
Torque9.4 Nm (1.0 kgf-m or 6.9 ft.lbs) @ 6000 RPM
Compression7.1:1
Bore x Stroke49.0 x 42.0 mm (1.9 x 1.7 inches)
Fuel SystemCarburettor. Mikuni VM18
IgnitionCDI
LubricationWet sump
CoolingOil & air
Max RPM12000
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet plate
Performance
Top Speed128.7 km/h (80.0 mph)
ExhaustSingle expansion chamber
Chassis
Frame TypeSteel cradle
Front SuspensionTelescopic forks
Rear SuspensionYamaha monoshock
Wheelbase1230 mm (48.4 inches)
Ground Clearance195 mm (7.7 inches)
Wheels & Brakes
Front Tyre2.50 -18
Rear Tyre2.76 -18
Front BrakesSingle disc. Single sliding piston caliper
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight78.0 kg (172.0 pounds)
Power/Weight0.1282 HP/kg
Seat Height765 mm (30.1 inches) If adjustable, lowest setting.
Overall Height790 mm (31.1 inches)
Overall Length2035 mm (80.1 inches)
Overall Width685 mm (27.0 inches)
Fuel Capacity10.00 litres (2.64 US gallons)
Reserve Fuel1.10 litres (0.29 US gallons)
Other
StarterKick
Color OptionsWhite or blue
Notes
This is the UK model. Only in production for 4 years 1979/82.
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.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
