The Yamaha XS 400 Special motorcycle specifications include a 392 cc (23.92 cu in) engine, a 6-speed gearbox, and a listed weight of 180 kg (396.8 lb).
Key specifications
How the Yamaha XS 400 Special 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 29% lower than the Yamaha database average. Around the 45th percentile across Yamaha models.
Very close to the Yamaha database average. Around the 49th percentile across Yamaha models.
Very close to the Yamaha database average. Around the 39th percentile across Yamaha models.
About 7% larger than the Yamaha database average. Around the 57th 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.
392 cc — larger displacement than about 45% of Yamaha models.
180 kg — heavier than about 49% of Yamaha models, or lighter than about 51%.
780 mm — taller than about 39% of Yamaha models.
14 L — larger than about 57% of Yamaha fuel tanks in this database.
Dimensions compared with Yamaha average
Each measurement is compared with the average value across Yamaha models where that dimension is available.
1,364
1,416
4% below average.
780
793
Close to average.
Mechanical overview
Additional useful specifications
| Front tire size | 3.00-18 |
|---|---|
| Rear tire size | 120/90-16 |
| Rear tire width | 120 mm |
| Rear tire aspect ratio | 90% |
| Rear rim diameter | 16 in |
| Bore/stroke ratio | 1.32:1 (Oversquare) |
Model information
| Year released | 1981 |
|---|
Engine specifications
| Engine type | Twin, four-stroke |
|---|---|
| Displacement | 392 cc (23.92 cu in) |
| Torque | 32.3 Nm (3.3 kgf-m or 23.8 ft.lbs) @ 8,000 rpm |
| Bore × stroke | 69.0 x 52.4 mm (2.7 x 2.1 inches) |
| Compression ratio | 9.3:1 |
| Valves per cylinder | 2 |
| Cooling system | Air |
| Fuel system | Carburettor. Mikuni BS32 |
| Fuel control | Overhead Cams (OHC) |
| Ignition | Battery ignition with contact breaker points |
| Starter | Electric & kick |
| Lubrication | Pressure-lubricated wet sump |
Transmission and drivetrain
| Gearbox | 6-speed |
|---|---|
| Final drive | Chain (final drive) |
| Clutch | Wet multiplate |
Chassis and suspension
| Frame | Tubular steel, semi-double cradle |
|---|---|
| Front suspension | Telescopic fork |
| Rear suspension | Dual shocks swing arm, preload adjustable |
Brakes, wheels and tires
| Front brakes | Single disc |
|---|---|
| Rear brakes | Expanding brake |
| Front tire | 3.00-18 |
| Rear tire | 120/90-16 |
Dimensions and weight
| Wet weight | 180 kg (396.8 lb) |
|---|---|
| Seat height | 780 mm (30.7 inches) |
| Wheelbase | 1,364 mm (53.7 inches) |
Fuel and emissions
| Fuel capacity | 14.00 L (3.70 US gal) |
|---|
Performance
| Top speed | 139.0 km/h (86.4 mph) |
|---|
Electrical and instruments
| Battery | ignition with contact breaker points |
|---|
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.