Engineered by Yamaha for the sport touring motorcycle segment, the 1982 Yamaha Seca features a 653 cc (39.9 cu in) air-cooled in-line four, four-stroke configuration. In factory specification, peak output is rated at 73 HP (53.3 kW) at 9,400 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 111.8 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 Seca measures 230.9 kg (509 lbs) dry, translating to a power-to-weight ratio of 0.32 HP/kg (3.16 kg per horsepower). The 18.55-liter (4.9 US gal) fuel tank paired with a rated consumption of 5.47 L/100 km provides an estimated theoretical range of roughly 339 km (211 miles) between fill-ups, while factory top speed is listed at 196 km/h (122 mph).
Specific Output
111.8 HP/L
Power-to-Weight
0.32 HP/kg (3.16 kg/HP)
Theoretical Range
~339 km (211 mi)
Engine
Displacement653.0 ccm (39.85 cubic inches)
Engine TypeIn-line four, four-stroke
Power73.0 HP (53.3 kW)) @ 9400 RPM
Compression10.5:1
Valves/Cylinder2
Fuel SystemCarburettor
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionDigital
LubricationWet sump
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet multiplate
DrivelineCardan shaft
Performance
Top Speed196.3 km/h (122.0 mph)
Fuel Consumption5.47 litres/100 km (18.3 km/l or 43.00 mpg)
Greenhouse Gases126.9 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustDouble with chrome pipes
Wheels & Brakes
Front Tyre3.25-19
Rear Tyre120/90-18
Front BrakesDouble disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight230.9 kg (509.0 pounds)
Power/Weight0.3162 HP/kg
Fuel Capacity18.55 litres (4.90 US gallons)
Other
StarterElectric
Color OptionsSilver grey with blue
Notes
European styling with great handling - Popular in Europe but did not sell well in the states - Sold in US 1982 only
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.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
