Motorcycles Specs > Yamaha > Yamaha XJ 400 Seca

Yamaha XJ 400 Seca Specs

The Yamaha XJ 400 Seca model is a Naked bike bike manufactured by Yamaha . In this version sold from year 1981 , the dry weight is 176.0 kg (388.0 pounds) and it is equiped with a Four cylinder boxer, four-stroke motor. The engine produces a maximum peak output power of 45.00 HP (32.8 kW) @ 10000 RPM and a maximum torque of 33.90 Nm (3.5 kgf-m or 25.0 ft.lbs) @ 8000 RPM . With this drive-train, the Yamaha XJ 400 Seca is capable of reaching a maximum top speed of 162.5 km/h (101.0 mph) . Regarding the chassis characteristics, responsible for road holding, handling behaviour and ride confort, the Yamaha XJ 400 Seca have a  frame with front suspension being 35mm Telescopic Forks and in the rear suspension it is equiped with  . Stock tire sizes are -19 on the front, and 110/90-18 on the rear. As for stopping power, the Yamaha XJ 400 Seca braking system includes Single disc. 1 Piston Caliper size  at the front and Expanding brake (drum brake) size  at the rear. 

Yamaha XJ 400 Seca General Information

Brand Yamaha 
Model Yamaha XJ 400 Seca 
Start year 1981 
Year 1981 
Category Naked bike 
Factory Warranty (Years / miles)

Yamaha XJ 400 Seca Dimensions, Aerodynamics and weight

Frame type
Seat details
Seat Height
Alternate Seat Height
Ground Clearance
Trail size
Wheels details
Front Tyres - Rims dimensions -19 
Rear Tyres - Rims dimensions 110/90-18 
Front brakes Single disc. 1 Piston Caliper 
Rear brakes Expanding brake (drum brake) 
Front Brakes Dimensions - Disc Dimensions
Rear Brakes Dimensions - Disc Dimensions
Curb Weight (including fluids)
Dry Weight 176.0 kg (388.0 pounds) 
Front Percentage of Weight
Rear Percentage of Weight
Weight-Power Output Ratio : 0.2557 HP/kg 
Fuel Tank Capacity
Reserve Fuel Capacity
Carrying Details and Capacity
Front Suspension 35mm Telescopic Forks 
Front Suspension Travel 142 mm (5.6 inches) 
Rear Suspension
Rear Suspension Travel 96 mm (3.8 inches) 

Yamaha XJ 400 Seca Engine and Transmission Technical Data

Engine type - Number of cylinders Four cylinder boxer, four-stroke 
Engine details
Fuel system Carburettor. 2x34 Mikuni 
Engine size - Displacement - Engine capacity 398.00 ccm (24.29 cubic inches) 
Bore x Stroke 51.0 x 48.8 mm (2.0 x 1.9 inches) 
Compression Ratio 9.7:1 
Number of valves per cylinder
Camshaft Valvetrain Configuration DOHC 
Maximum power - Output - Horsepower 45.00 HP (32.8 kW) @ 10000 RPM 
Maximum torque 33.90 Nm (3.5 kgf-m or 25.0 ft.lbs) @ 8000 RPM 
Engine Maximum RPM
Cooling system Air 
Lubrication system
Engine oil capacity
Exhaust system
Gearbox 6-speed 
Transmission type, final drive ratio Chain 
Clutch type

Yamaha XJ 400 Seca Performance

Top Speed 162.5 km/h (101.0 mph) 
Acceleration 0 to 100 km/h (0 to 62 mph)
Acceleration 0 to 400m (1/4 mile) 14.000 seconds 
Recuperation 60 to 140 km/h in highest gear
Fuel Consumption - MPG - Economy - Efficiency
CO2 emissions

Yamaha XJ 400 Seca Electrical Systems, Ignition and Equipment

Ignition Type Battery Powered Inductive 
Electrical Details
Starter Type Electric 
How much horsepower does a Yamaha XJ 400 Seca have?
The Yamaha XJ 400 Seca has 45.00 HP (32.8 kW) @ 10000 RPM.

How fast is a Yamaha XJ 400 Seca?
The Yamaha XJ 400 Seca top speed is 162.5 km/h (101.0 mph).

How much does a Yamaha XJ 400 Seca weighs?
The Yamaha XJ 400 Seca weighs 176.0 kg (388.0 pounds).