Yamaha XT 225 Serow (1987-89) vs Yamaha YD-2 (1958-60)
Comparison technical specifications
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| Make: | Yamaha | Yamaha |
| Model: | XT 225 Serow | YD-2 |
| Years: | 1987-89 | 1958-60 |
| Engine: | Four stroke, single cylinder, SOHC, 2 valve | Two stroke, piston-port, parallel twin |
| Capacity: | 223 cc / 13.6 cu-in | 247 cc / 15.0 cu-in |
| Bore x Stroke: | 70 X 58mm | 54 x 54 mm |
| Cooling System: | Air cooled | Air-cooled |
| Compression Ratio: | 9.5:1 | |
| Induction: | 34mm Mikuni carburetor | Single carburetor |
| Starting: | Kick | Kick |
| Max Power: | 20 hp / 15 kW @ 8000 rpm | 14.5 hp @ 6000 rpm |
| Max Torque: | 19 Nm / 14 lb-ft @ 7000 rpm | 4.1 kg-m @ 5000 rpm |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Telescopic fork | Telescopic forks |
| Rear Suspension: | Swingarm rebound adjustable. single shock | Swing arm |
| Front Brakes: | Single 220mm disc | Drum |
| Rear Brakes: | Single 110mm drum | Drum |
| Front Tyre: | 2.75-21 | 2.50 -16 |
| Rear Tyre: | 120/80-18 | 2.50 -16 |
| Fuel Capacity: | 8.7 Liters / 2.3 US gal |