| Application Data |
| Iridium Option:CR8EIX | | Month / Year | Make | Model | Series | Engine | Other | Gap (mm) | | Capacity | Information | | 03/2003-02/2004 | Yamaha | WR450F | R | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 03/2004-11/2004 | Yamaha | WR450F | S | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 12/2004-10/2005 | Yamaha | WR450F | T | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 11/2005-01/2007 | Yamaha | WR450F | V | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 01/2007-10/2007 | Yamaha | WR450F | W07 | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 11/2007 Onwards | Yamaha | WR450F | X | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 12/2004-09/2006 | Yamaha | WR450F | 2-TRAC | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 11/2007-01/2009 | Yamaha | YFZ450 | X | 449 cc | ATV,DOHC, 5V, 4 Stroke | 0.7 | | 02/2009 Onwards | Yamaha | YFZ450R | Y | 449 cc | ATV,DOHC, 5V, 4 Stroke | 0.7 | | 10/2006-10/2007 | Yamaha | YFZ450SE | W | 449 cc | ATV,DOHC, 5V, 4 Stroke | 0.7 | | 11/2007-01/2009 | Yamaha | YFZ450SP | X | 449 cc | ATV,DOHC, 5V, 4 Stroke | 0.7 | | 03/2003-10/2005 | Yamaha | YZ450F | R | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 11/2005-09/2006 | Yamaha | YZ450F | V | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 10/2009 Onwards | Yamaha | YZ450F | X | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 08/2008-04/2009 | Yamaha | YZ450F | Y | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 05/2009-09/2009 | Yamaha | YZ450F | 9 | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | 11/2005-10/2007 | Yamaha | YZ450F | V, 50TH | 449 cc | DOHC, 5V, 4 Stroke | 0.7 | | ANNIVERSARY | | 10/2006-10/2007 | Yamaha | YZ450F | W | 499 cc | DOHC, 5V, 4 Stroke | 0.7 | | 11/2007-07/2008 | Yamaha | YZ450F | X | 499 cc | DOHC, 5V, 4 Stroke | 0.7 | | | | | | | | |