The Yamaha XJ 550 Seca motorcycle specifications include a 528 cc (32.22 cu in) engine, power of 50 hp (36.5 kW) @ 9,000 rpm, a 6-speed gearbox, and a listed weight of 204 kg (449.7 lb).
Key specifications
How the Yamaha XJ 550 Seca compares
This compares the motorcycle with all Yamaha models in this specifications database. The blue marker is this model and the grey line is the Yamaha database average.
About 6% lower than the Yamaha database average. Around the 60th percentile across Yamaha models.
Very close to the Yamaha database average. Around the 54th percentile across Yamaha models.
About 9% heavier than the Yamaha database average. Around the 61st percentile across Yamaha models.
Very close to the Yamaha database average. Around the 49th percentile across Yamaha models.
About 15% larger than the Yamaha database average. Around the 61st percentile across Yamaha models.
Yamaha database percentile rankings
Percentiles show where this motorcycle sits across the Yamaha specifications database. They are descriptive database rankings, not performance ratings.
50 hp — more powerful than about 60% of Yamaha models with power data.
528 cc — larger displacement than about 54% of Yamaha models.
204 kg — heavier than about 61% of Yamaha models, or lighter than about 39%.
790 mm — taller than about 49% of Yamaha models.
15 L — larger than about 61% of Yamaha fuel tanks in this database.
Mechanical overview
Additional useful specifications
| Rear tire size | 110/90-18 |
|---|---|
| Rear tire width | 110 mm |
| Rear tire aspect ratio | 90% |
| Rear rim diameter | 18 in |
| Front tire pressure | 28 PSI (1.9 Bar or 190 kPa) |
| Rear tire pressure | 33 PSI (2.3 Bar or 230 kPa) |
| Engine oil | SAE 20W-40 |
| Engine oil capacity | 2.50 L (2.64 US qt) |
| Spark plug | NGK D8EA, NGK DR8EIX |
| Chain links | 104 |
| Sprocket sizes | 16/45 (front/rear) |
| Power-to-weight ratio | 0.245 hp/kg |
| Power-to-weight | 245.1 hp/tonne |
| Specific power | 94.7 hp/L |
| Bore/stroke ratio | 1.10:1 (Oversquare) |
Model information
| Year released | 1983 |
|---|---|
| Category | Naked bike |
Engine specifications
| Engine type | In-line four, four-stroke |
|---|---|
| Displacement | 528 cc (32.22 cu in) |
| Power | 50 hp (36.5 kW) @ 9,000 rpm |
| Torque | 41.9 Nm (4.3 kgf-m or 30.9 ft.lbs) |
| Bore × stroke | 57.0 x 51.8 mm (2.2 x 2.0 inches) |
| Compression ratio | 9.5:1 |
| Valves per cylinder | 2 |
| Cooling system | Air |
| Fuel system | Carburettor. 4 x 28mm Mikuni |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Ignition | Battery powered inductive |
| Starter | Electric |
| Engine oil | SAE 20W-40 |
| Oil capacity | 2.50 L (2.64 US qt) |
| Spark plugs | NGK D8EA, NGK DR8EIX |
Transmission and drivetrain
| Gearbox | 6-speed |
|---|---|
| Final drive | Chain (final drive) |
| Chain links | 104 |
| Sprockets | 16/45 (front/rear) |
Chassis and suspension
| Front suspension | Telescopic coil spring forks |
|---|---|
| Rear suspension | Swinging arm with dual dampers adjustable for preload |
| Front wheel travel | 137 mm (5.4 inches) |
| Rear wheel travel | 80 mm (3.1 inches) |
| Fork tube size | 35 mm (1.4 inches) |
Brakes, wheels and tires
| Front brakes | Double disc |
|---|---|
| Rear brakes | Expanding brake |
| Rear tire | 110/90-18 |
| Front tire pressure | 28 PSI (1.9 Bar or 190 kPa) |
| Rear tire pressure | 33 PSI (2.3 Bar or 230 kPa) |
Dimensions and weight
| Wet weight | 204 kg (449.7 lb) |
|---|---|
| Seat height | 790 mm (31.1 inches) |
Fuel and emissions
| Fuel capacity | 15.00 L (3.96 US gal) |
|---|
Performance
| Top speed | 176.0 km/h (109.4 mph) |
|---|
Electrical and instruments
| Battery | powered inductive |
|---|---|
| Electrical | Starting battery. |
Other specifications
| Color options | Red, white |
|---|---|
| Brake fluid | DOT 4 |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Yamaha models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Yamaha information before relying on them. Visit the official Yamaha website.