Yamaha WR 450F (2009-10) vs Yamaha WR 125X (2011-12)
Comparison technical specifications
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| Make: | Yamaha | Yamaha |
| Model: | WR 450F | WR 125X |
| Years: | 2009-10 | 2011-12 |
| Engine: | Four stroke, single cylinder, DOHC, 5 titanium valve per cylinder. | Four stroke, forward inclined single cylinder, DOHC, 4 valve |
| Capacity: | 449 cc / 27.4 in | 124.7 |
| Bore x Stroke: | 95 x 63.4 mm | 52 x 58.6 mm |
| Cooling System: | Liquid cooled | LLiquid cooled |
| Compression Ratio: | 12.5:1 | 11.2:1 |
| Induction: | 39mm Keihin FCR flat-slide throttle position sensor | Fuel injection |
| Ignition: | Digital CDI | TCI |
| Starting: | Electric / Kick-starter | Electric |
| Max Power: | 58 hp / 42.3 kW @ 9000 rpm | 10.9 kW / 15 hp @ 9000 rpm |
| Max Torque: | 49 Nm / 33.1 lb-ft @ 7000 rpm | 12.2 Nm / 1.24 kgf-m @ 6000 rpm |
| Clutch: | Wet, multiple discs, cable operated | Wet, multiple coil spring |
| Transmission: | 5 Speed | 5 Speed |
| Final Drive: | "O" ring Chain | Chain |
| Frame: | Steel, Single cradle frame | Steel double cradle |
| Front Suspension: | 46mm Kayaba inverted telescopic fork, compression and rebound damping adjustable | Telescopic fork |
| Front Wheel Travel: | 300 mm / 11.8 in | 210 mm / 8.2 in |
| Rear Suspension: | Fully adjustable Kayaba single shock, 315mm wheel travel, separate speed compression adjustment | Swinging arm link suspension |
| Rear Wheel Travel: | 318 mm / 12.4 in | 230 ,mm / 9.0 in |
| Front Brakes: | Single 250mm disc 4 piston caliper | Single 298mm disc |
| Rear Brakes: | Single 245mm disc 2-piston caliper | Single 220mm disc |
| Front Tyre: | 80/100-21 | 110/70-17 |
| Rear Tyre: | 110/100-18 | 140/70-17 |
| Wheelbase: | 1485 mm / 58.5 in | 1430 mm / 56.3 in |
| Seat Height: | 998 mm / 39.3 in | 920 mm / 36.2 in |
| Wet Weight: | 122 kg / 268 lbs | 137 kg / 302 lbs |
| Fuel Capacity: | 8 Liters / 2.1 US gal | 8.5 Litres / 2..2 US gal |