What is the engine displacement of the Yamaha 400 Seca?

The Yamaha 400 Seca has an engine displacement of 398.0 ccm (24.29 cubic inches).

What is the top speed of the Yamaha 400 Seca?

The Yamaha 400 Seca has a top speed of 162.5 km/h (101.0 mph).

How much does the Yamaha 400 Seca weigh?

The Yamaha 400 Seca has a dry weight of 176.0 kg (388.0 pounds).

Yamaha 400 Seca Price, Specs, Review

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Review

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The 1981 Yamaha XJ 400 Seca is a classic inline-four motorcycle that offers a blend of performance and versatility. Its 398cc engine produces 33.9 Nm of torque at 8000 RPM, providing a smooth and responsive power delivery. With a top speed of 162.5 km/h (101.0 mph) and a 6-speed gearbox, it's capable of handling both city streets and open highways. The XJ400 Seca represents a popular era of Japanese motorcycle engineering. Weighing 176 kg (388.0 pounds), the XJ 400 Seca is relatively lightweight for its class, contributing to its nimble handling. The front suspension features 35mm telescopic forks, providing a comfortable ride. The single disc front brake with a 1-piston caliper offers adequate stopping power for typical riding conditions. The Yamaha XJ 400 Seca is targeted towards riders who appreciate a classic motorcycle with a smooth engine and versatile performance. Its comfortable riding position, reliable engine, and classic styling make it a popular choice for both new and experienced riders. It's a great option for those who want a vintage motorcycle that's both fun to ride and easy to maintain.

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Pros (Advantages)

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✅ Why buy this bike?

• Nimble handling and lightweight chassis make it excellent for urban commuting and tight turns. • Reliable Yamaha engineering ensures good longevity and relatively low maintenance if cared for. • Comfortable riding position for its class, suitable for short to medium distance rides. • Decent fuel economy from the 398cc engine, reducing running costs for daily use. • Classic UJM styling appeals to riders seeking a vintage aesthetic with modern reliability. • Accessible power delivery makes it a forgiving and excellent choice for new riders.

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Cons (Disadvantages)

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⚠️ Things to consider

• Limited power for highway cruising, struggles to keep up with faster traffic. • Outdated braking technology compared to modern bikes, requiring more stopping distance. • Suspension can feel soft and underdamped, especially with a passenger or aggressive riding. • Parts availability can be challenging for specific model-year components due to age. • Less comfortable for long-distance touring, lacking wind protection and luggage capacity.

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License Class (EU)

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Rule of thumb: under 125cc / 15HP → A1, under 47HP → A2, above → A.

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Fuel Economy & Running Costs

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Estimated average for 398cc class: 45-60 mpg (4.0-5.5 L/100km)

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Insurance Class

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Insurance grouping for Yamaha 400 Seca (398cc):