Yamaha WR 250X (2008-09) vs Yamaha YZF-R 25 (2018-19) vs Yamaha TDM 900A (2008-09) vs Yamaha SDR 200 (1987-89) vs Yamaha DT 125 (1975-76)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | WR 250X | YZF-R 25 | TDM 900A | SDR 200 | DT 125 |
| Years: | 2008-09 | 2018-19 | 2008-09 | 1987-89 | 1975-76 |
| Engine: | Four stroke, single cylinder, DOHC, 4 valve | Four stroke, parallel twin cylinder, DOHC, 4 valve per cylinder | Four stroke, parallel twin cylinder, DOHC, 5 valves per cylinder | Two stroke, single cylinder, YPVS | Two stroke, single cylinder |
| Capacity: | 249 / 15.2 cub in. | 249 cc / 15.1 cu-in | 897 cc / 54.7 cu-in | 195 cc / 11.8 cu-in | 123 cc / 7.5 cu-in |
| Bore x Stroke: | 77 x 53.6 mm | 60 x 44.1 mm | 92 x 67.5 mm | 66 х 57 mm | 56 х 50 mm |
| Compression Ratio: | 11.8:1 | 11.6:1 | 10.4:1 | 5.9:1 | 6.9:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled | Air cooled |
| Induction: | Electronic fuel injection | Electronic Fuel Injection | Electronic Fuel Injection | 28mm Flat-side Mikuni carburetor | Mikuni TS28SS Carburettor |
| Ignition: | TCI | TCI: Transistor Controlled Ignition | TCI | Transistorized | Magneto |
| Starting: | Electric | Electric | Electric | Electric | kick |
| Max Power: | 22.6 kW / 30.3 hp @ 10 000 rpm | 26.5 kW / 36 PS @ 12000 rpm | 86.2 hp / 63.4kW @ 7500 rpm | 34 hp / 24.1 kW @ 9000 rpm | 12.9 kW / 17.3 hp @ 7000 rpm |
| Max Torque: | 23.7 Nm 2.42 kgf-m / 17.5 lb-ft. @ 8 000 rpm | 22.1 Nm / 16.7 lb-ft @ 10000 rpm | 88.8 Nm / 9.1 kgf-m @ 6000 rpm | 2.8 kgf-m / 20.2 lb-ft @ 8000 rpm | 1.4 kgf-m / 10 lb-ft @ 7000 rpm |
| Transmission: | 6 Speed | Constant Mesh, 6-speed | 6 speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Chain | Chain |
| Front Suspension: | Inverted fork; fully adjustable, 269mm wheel travel | 41mm KYB® telescopic fork; | Telescopic fork | 33mm Telescopic forks | Telescopic forks |
| Rear Suspension: | Single shock; fully adjustable, 264mm wheel travel | KYB® single shock | Swingarm Link-type | Monocross 9-way preload | Dual shocks |
| Front Brakes: | Single 298mm disc | Single 298mm disc 2 piston caliper | 2 x 298mm discs with ABS | Single disc 2 piston caliper | Drum |
| Rear Brakes: | Single 230mm disc | Single 220mm disc | Single 248mm disc with ABS | Single disc 2 piston caliper | Drum |
| Front Tyre: | 110/70-17 | 110/70-17M/C 54H | 120/70 ZR18 | 90/80-17 | 2.75-21 |
| Rear Tyre: | 140/70-17 | 140/70-17M/C 66H | 160/60 ZR17 | 110/80-17 | 3.50-18 |
| Fuel Capacity: | 7.6 Litres / 2.0 gal | 14 Litres / 3.7 gal | 20 Litres / 5.2 US gal | 9.5 Litres / 3.0 US gal | 9.5 Litres / 2.5 US gal |