Brand New Ferrea Racing Complete Rebuild Kit
Springs, Titanium Retainers, Seat Locators
OEM / Stock Size Direct Replacement Intake & Exhaust Valves With Seals Kit

Meticulously designed! Made in the U.S.A using the highest quality materials.

Fits Yamaha YFZ450 Carb Model ATV's 
Years 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013

Fits Yamaha YFZ450R & YFZ450X Fuel Injected Model ATV's
Years 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024


This kit Includes:
  • Titanium Retainers (5)
  • Single Springs (5)
  • Spring Seat Locators (5)
  • Stainless Steel Intake Valves (Pair (2) 
  • Stainless Steel Intake Valve Center (1)
  • Stainless Steel Exhaust Valves (Pair (2) 
  • Viton Hi Temp Valve Stem Seals (5) (May be red or blue, same viton material)


Outer Intake Valve Specs:
Head Diameter: 27.00 mm
Stem Diameter: 4.48

Inner Intake Valve Specs:
Head Diameter: 27.00 mm
Stem Diameter: 4.48

Exhaust Valve Specs:
Head Diameter: 28.00 mm
Stem Diameter: 4..97

Intake & Exhaust Spring Specs:
Seat Press: 38lbs
Open Seat Press: 85lbs
Max Lift: .430 (.433")

                                Images are stock photos. Individual kits may vary slightly.