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Husqvarna's open-class four-stroke motocross bike, a name used from the Swedish 510 of the 1980s to the Italian DOHC 501cc bike of 2006–2009. For open-class racers.
| 2007 | 107.5 kg | 980 mm | US$6,998 |
| 2008 | 105 kg | 968 mm | US$7,198 |
| 2009 | 105 kg | 968 mm | US$7,699 |