Yamaha XJ 400 Special (1981) vs Yamaha DT 125 (1977)
Comparison technical specifications
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| Make: | Yamaha | Yamaha |
| Model: | XJ 400 Special | DT 125 |
| Years: | 1981 | 1977 |
| Engine: | Four stroke, transverse four cylinder. DOHC | Two stroke, single cylinder, reed-valve |
| Capacity: | 398 cc / 24.2 cu-in | 123 cc / 7.5 cu-in |
| Bore x Stroke: | 51 х 48.8 mm | 56 х 50 mm |
| Cooling System: | Air cooled | Air cooled |
| Compression Ratio: | 9.7:1 | 7.2:1 |
| Induction: | 2x 34mm Mikuni carburetor | Single 24 mm Mikuni carburettor |
| Ignition: | Battery powered inductive | Magneto |
| Starting: | Electric | Kick |
| Max Power: | 45 hp / 32.8 kW @ 10000 rpm | 13 hp / 9.5 kW @ 7000 rpm |
| Max Torque: | 3.5 kgf-m / 25 lb-ft@ 8000 rpm | 9.8 lb-ft @ 6,500 rpm |
| Transmission: | 6 Speed | 6 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | 35mm Telescopic forks | Telescopic forks |
| Rear Suspension: | Single shock, adjustable spring preload | Monocross |
| Front Brakes: | Single discs 2 piston caliper | Drum |
| Rear Brakes: | Drum | Drum |
| Front Tyre: | 3.00-19 | 2.75-21 |
| Rear Tyre: | 110 90-18 | 3.50-18 |
| Dry Weight: | 176 kg / 388 lbs | 96 kg / 212 lbs |
| Fuel Capacity: | 15 Litres / 3.9 US gal | 6.8 Litres / 1.8 gal |