Yamaha® YFZ™ 450 2004-2009 Yamaha® YFZ™ 450X 2008-2011 Yamaha® YFZ™ 450R 2009-2020 Yamaha® YFZ™ 450SE 2010-2020 Yamaha® WR™ 450 2003-2015 Yamaha® YZ™ 450F 2003-2009
SPRING KIT STEEL VALVE CONVERSION-
Yamaha® YFZ™ 450 2004-2009 Yamaha® YFZ™ 450X 2008-2011 Yamaha® YFZ™ 450R 2009-2020 Yamaha® YFZ™ 450SE 2010-2020 Yamaha® WR™ 450 2003-2015 Yamaha® YZ™ 450F 2003-2009
- +1mm O/S Exhaust
- 2 required
-
-
Yamaha® YFZ™ 450 2004-2009 Yamaha® YFZ™ 450X 2008-2011 Yamaha® YFZ™ 450R 2009-2020 Yamaha® YFZ™ 450SE 2010-2020 Yamaha® WR™ 450 2003-2015 Yamaha® YZ™ 450F 2003-2009
- +1mm O/S Outer INTAKE
- 1 required
-
Yamaha® YFZ™ 450 2004-2009 Yamaha® YFZ™ 450X 2008-2011 Yamaha® YFZ™ 450R 2009-2020 Yamaha® YFZ™ 450SE 2010-2020 Yamaha® WR™ 450 2003-2015 Yamaha® YZ™ 450F 2003-2009
- +1mm O/S Outer INTAKE
- 2 required
-
Yamaha® YZ™ 450F 2014-2019 Yamaha® YZ™ 450FX 2016-2020 Yamaha® WR™ 450F 2016-2021
+.5mm O/Size on 2010-13 Models
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Yamaha® YZ™ 450F 2014-2019 Yamaha® YZ™ 450FX 2016-2020 Yamaha® WR™ 450F 2016-2021
+1mm O/Size on 2010-13 Models
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