Engine | 2009 WR450F
| 2009 YZ450F
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Bore x Stroke | 95.0mm x 63.4mm | 95.0 x 63.4mm |
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Carburetion | Keihin® FCR 39 | Keihin FCR MX39 |
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Compression Ratio | 12.3:1 | 12.3:1 |
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Final Drive | Chain Drive | Chain Drive |
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Ignition | CDI | CDI |
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Transmission | Constant-mesh 5-speed; multiplate wet clutch | Constant-mesh 5-speed; multiplate wet clutch |
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Type | 449cc liquid-cooled DOHC 4-stroke; 5 titanium valves | 449cc liquid-cooled DOHC 4-stroke; 5 titanium valves |
|
|
Chassis | 2009 WR450F
| 2009 YZ450F
|
Brakes/Front | Hydraulic single disc brake, 250mm | Hydraulic single disc brake, 245mm |
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Brakes/Rear | Hydraulic single disc brake, 245mm | Hydraulic single disc brake, 245mm |
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Suspension/Front | Inverted fork; fully adjustable, 11.8-in travel | Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel |
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Suspension/Rear | Single shock; fully adjustable, 12-in travel | Fully adjustable single shock; 12.3-in travel |
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Tires/Front | 80/100-21 51M | 80/100-21-Dunlop 742FA |
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Tires/Rear | 110/100-18 64M | 120/80-19-Dunlop 756 |
|
|
Dimensions | 2009 WR450F
| 2009 YZ450F
|
Fuel Capacity | 2.1 gal | 1.8 gal |
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Ground Clearance | 14.4 in | 14.7 in |
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Height | 51.0 in | 51.4 in |
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Length | 85.6 in | 86.4 in |
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Seat Height | 38.6 in | 38.9 in |
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Wet Weight | 271 lb | 238 lb |
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Wheelbase | 58.5 in | 58.8 in |
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Width | 32.5 in | 32.5 in |
|
|
Other | 2009 WR450F
| 2009 YZ450F
|
Warranty | 30 Day (Limited Factory Warranty) | 30 Day (Limited Factory Warranty) |
|
MSRP* | $7,499 (Team Yamaha Blue/White) Available from August 2008
| $7,399 (Team Yamaha Blue/White) Available from July 2008
$7,499 (White/Red) Available from July 2008
|