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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 
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