The Yamaha XJ 750 Seca motorcycle specifications include a 748 cc (45.64 cu in) engine, a 5-speed gearbox, and a listed weight of 241 kg (531.3 lb).
Key specifications
The 1981 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
How the Yamaha XJ 750 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 36% higher than the Yamaha database average. Around the 73rd percentile across Yamaha models.
About 29% heavier than the Yamaha database average. Around the 78th percentile across Yamaha models.
About 38% larger than the Yamaha database average. Around the 82nd 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.
748 cc — larger displacement than about 73% of Yamaha models.
241 kg — heavier than about 78% of Yamaha models, or lighter than about 22%.
18 L — larger than about 82% of Yamaha fuel tanks in this database.
Mechanical overview
Additional useful specifications
| Front tire size | 3.25-19 |
|---|---|
| Rear tire size | 120/90-18 |
| Rear tire width | 120 mm |
| Rear tire aspect ratio | 90% |
| Rear rim diameter | 18 in |
| Bore/stroke ratio | 1.15:1 (Oversquare) |
Model information
| Category | Sport touring |
|---|
Engine specifications
| Engine type | In-line four, four-stroke |
|---|---|
| Displacement | 748 cc (45.64 cu in) |
| Torque | 67.0 Nm (6.8 kgf-m or 49.4 ft.lbs) @ 6,900 rpm |
| Bore × stroke | 65.0 x 56.4 mm (2.6 x 2.2 inches) |
| Compression ratio | 9.2:1 |
| Valves per cylinder | 2 |
| Cooling system | Air |
| Fuel system | Carburettor. 4 x 34mm Mikuni |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Ignition | Transistorized |
| Starter | Electric |
Transmission and drivetrain
| Gearbox | 5-speed |
|---|---|
| Final drive | Shaft drive (cardan) (final drive) |
Chassis and suspension
| Frame | Steel, double cradle |
|---|---|
| Front suspension | Telescopic forks |
| Rear suspension | Swing arm |
| Front wheel travel | 150 mm (5.9 inches) |
| Rear wheel travel | 96 mm (3.8 inches) |
Brakes, wheels and tires
| Front brakes | Single disc |
|---|---|
| Rear brakes | Expanding brake |
| Front tire | 3.25-19 |
| Rear tire | 120/90-18 |
Dimensions and weight
| Wet weight | 241 kg (531.3 lb) |
|---|---|
| Wheelbase | 1,445 mm (56.9 inches) |
Fuel and emissions
| Fuel capacity | 18.00 L (4.76 US gal) |
|---|
Performance
| Top speed | 204.0 km/h (126.8 mph) |
|---|
Other specifications
| Comments | American spec: 32.5 inches seating height. American spec: 35 watt halogen smaller light. Euro spec: 12V bayonet fix, bulb smaller light. Adjustable height x 4 rear shock positioning. Anti-dive adjustable front forks. |
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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.