The Yamaha XJ 400 Special is a motorcycle produced in 1981. It has a four-stroke, transverse four-cylinder engine with a capacity of 398cc and a compression ratio of 9.7:1. The bike has 2x 34mm Mikuni carburetor induction and a battery-powered inductive ignition with an electric start. It has a maximum power of 45 hp / 32.8 kW @ 10000 rpm and a maximum torque of 3.5 kgf-m / 25 Nm @ 8000 rpm. The transmission is a six-speed with a final drive chain. The front suspension is a 35mm telescopic fork with a front wheel travel of 142mm / 5.6 in, while the rear suspension is a single shock with an adjustable spring preload and a rear wheel travel of 96mm / 3.8 in. The front brakes have a single disc with a 2-piston caliper, while the rear brakes are a drum. The bike has a front tire of 3.00-19 and a rear tire of 110 90-18. The dry weight is 176kg / 388lbs, and the fuel capacity is 15 liters / 3.9 US gal.
Technical specifications:
Make Model: Yamaha XJ 400 Special
| Year | 1981 |
|---|---|
| Engine | Four stroke, transverse four cylinder. DOHC |
| Capacity | 398 cc / 24.2 cu-in |
| Bore x Stroke | 51 48.8 mm |
| Cooling System | Air cooled |
| Compression Ratio | 9.7:1 |
| Induction | 2x 34mm Mikuni carburetor |
| Ignition | Battery powered inductive |
| Starting | Electric |
| Max Power | 45 hp / 32.8 kW @ 10000 rpm |
| Max Torque | 3.5 kgf-m / 25 [email protected] 8000 rpm |
| Transmission | 6 Speed |
| Final Drive | Chain |
| Front Suspension | 35mm Telescopic forks |
| Front Wheel Travel | 142 mm / 5.6 in |
| Rear Suspension | Single shock, adjustable spring preload |
| Rear Wheel Travel | 96 mm / 3.8 in |
| Front Brakes | Single discs 2 piston caliper |
| Rear Brakes | Drum |
| Front Tyre | 3.00-19 |
| Rear Tyre | 110 90-18 |
| Dry Weight | 176 kg / 388 lbs |
| Fuel Capacity | 15 Litres / 3.9 US gal |
