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| Model | Yamaha YFZ450X |
| Year | 2011 |
| Price as new | US$ 8599. MSRP depends on country, taxes, accessories, etc. |
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| Displacement | 449.0 ccm (27.40 cubic inches) |
| Engine type | Single cylinder, four-stroke |
| Engine details | Liquid Cooled w/Fan, Titanium 5-Valve DOHC |
| Compression | 11.6:1 |
| Bore x stroke | 95.0 x 63.4 mm (3.7 x 2.5 inches) |
| Valves per cylinder | 5 |
| Fuel system | Injection. Yamaha Fuel Injection (YFI), 42mm |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Ignition | Digital TCI: Transistor Controlled Ignition |
| Cooling system | Liquid |
| Gearbox | 5-speed |
| Transmission type | Chain (final drive) |
| Clutch | Drive Train |
| Driveline | 2WD; Sealed O-Ring Chain, Eccentric Adjustment |
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| Front suspension | Independent double wishbone, w/Kashima coated piggyback shocks, High/Low speed compression, rebound and threaded preload adjustment, 9.4-in travel |
| Rear suspension | Cast aluminum swingarm w/piggyback High/Low speed compression, rebound and threaded preload adjustment, 11.0-in travel |
| Front tire | 21/7-10 |
| Rear tire | 20/10-9 |
| Front brakes | Double disc |
| Rear brakes | Single disc |
| Weight incl. oil, gas, etc | 181.4 kg (400.0 pounds) |
| Seat height | 810 mm (31.9 inches) If adjustable, lowest setting. |
| Overall height | 1064 mm (41.9 inches) |
| Overall length | 1796 mm (70.7 inches) |
| Overall width | 1171 mm (46.1 inches) |
| Ground clearance | 114 mm (4.5 inches) |
| Wheelbase | 1270 mm (50.0 inches) |
| Fuel capacity | 9.84 litres (2.60 US gallons) |
