The Yamaha XJ 750 S motorcycle specifications include a 749 cc (45.70 cu in) engine, power of 87 hp (63.5 kW) @ 9,000 rpm, a 5-speed gearbox, and a listed weight of 241 kg (531.3 lb).
Key specifications
The 1984 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
How the Yamaha XJ 750 S 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 63% higher than the Yamaha database average. Around the 75th percentile across Yamaha models.
About 36% higher than the Yamaha database average. Around the 75th percentile across Yamaha models.
About 29% heavier than the Yamaha database average. Around the 78th percentile across Yamaha models.
About 69% larger than the Yamaha database average. Around the 94th 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.
87 hp — more powerful than about 75% of Yamaha models with power data.
749 cc — larger displacement than about 75% of Yamaha models.
241 kg — heavier than about 78% of Yamaha models, or lighter than about 22%.
22 L — larger than about 94% of Yamaha fuel tanks in this database.
Mechanical overview
Additional useful specifications
| Front tire size | 100/90-18 |
|---|---|
| Rear tire size | 120/90-18 |
| Front tire width | 100 mm |
| Front tire aspect ratio | 90% |
| Front rim diameter | 18 in |
| Rear tire width | 120 mm |
| Rear tire aspect ratio | 90% |
| Rear rim diameter | 18 in |
| Power-to-weight ratio | 0.361 hp/kg |
| Power-to-weight | 361.0 hp/tonne |
| Specific power | 116.2 hp/L |
| Bore/stroke ratio | 1.15:1 (Oversquare) |
Model information
| Category | Classic |
|---|
Engine specifications
| Engine type | In-line four, four-stroke |
|---|---|
| Displacement | 749 cc (45.70 cu in) |
| Power | 87 hp (63.5 kW) @ 9,000 rpm |
| Bore × stroke | 65.0 x 56.4 mm (2.6 x 2.2 inches) |
| Compression ratio | 9.8:1 |
| Valves per cylinder | 2 |
| Cooling system | Air |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
Transmission and drivetrain
| Gearbox | 5-speed |
|---|---|
| Final drive | Shaft drive (cardan) (final drive) |
Brakes, wheels and tires
| Front brakes | Dual disc |
|---|---|
| Rear brakes | Single disc |
| Front tire | 100/90-18 |
| Rear tire | 120/90-18 |
Dimensions and weight
| Wet weight | 241 kg (531.3 lb) |
|---|
Fuel and emissions
| Fuel capacity | 22.00 L (5.81 US gal) |
|---|
Performance
| Top speed | 203.0 km/h (126.1 mph) |
|---|
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.