The Yamaha XJ 650 (reduced effect) motorcycle specifications include a 653 cc (39.85 cu in) engine, power of 50 hp (36.5 kW) @ 7,500 rpm, a 5-speed gearbox, and a listed weight of 231 kg (509.3 lb).
Key specifications
Year-specific specification changes
How the Yamaha XJ 650 (reduced effect) 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.
About 19% higher than the Yamaha database average. Around the 65th percentile across Yamaha models.
About 24% heavier than the Yamaha database average. Around the 75th percentile across Yamaha models.
About 57% larger than the Yamaha database average. Around the 92nd 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.
653 cc — larger displacement than about 65% of Yamaha models.
231 kg — heavier than about 75% of Yamaha models, or lighter than about 25%.
20.5 L — larger than about 92% 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 |
| Power-to-weight ratio | 0.216 hp/kg |
| Power-to-weight | 216.5 hp/tonne |
| Specific power | 76.6 hp/L |
| Bore/stroke ratio | 1.20:1 (Oversquare) |
Engine specifications
| Engine type | In-line four, four-stroke |
|---|---|
| Displacement | 653 cc (39.85 cu in) |
| Power | 50 hp (36.5 kW) @ 7,500 rpm |
| Bore × stroke | 63.0 x 52.4 mm (2.5 x 2.1 inches) |
| Compression ratio | 8.5:1 |
| 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 | Expanding brake |
| Front tire | 3.25-19 |
| Rear tire | 120/90-18 |
Dimensions and weight
| Wet weight | 231 kg (509.3 lb) |
|---|
Fuel and emissions
| Fuel capacity | 20.50 L (5.42 US gal) |
|---|
Performance
| Top speed | 173.0 km/h (107.5 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.