Brand New Ferrea Racing Complete Rebuild Kit
Springs, Titanium Retainers, Seat Locators
+1mm Oversized Intake & Exhaust Valves With Seals Kit
Meticulously designed! Made in the U.S.A using the highest quality materials.
Yamaha YFZ450 ATV Years 2004-2013
YFZ450R & YFZ450X Years 2009-2025
This kit Includes:
- Titanium Retainers (5)
- Single Springs (5)
- Spring Seat Locators (5)
- Stainless Steel Intake Valves +1mm (Pair (2)
- Stainless Steel Intake Valve Center +1mm (1)
- Stainless Steel Exhaust Valves +1mm (Pair (2)
- Viton Hi Temp Valve Stem Seals (5) (May be red or blue, same viton material)
Outter Intake Valve Specs:
Head Diameter: 28.00 mm
Stem Diameter: 4.48
Inner Intake Valve Specs:
Head Diameter: 28.00 mm
Stem Diameter: 4.48
Exhaust Valve Specs:
Head Diameter: 29.00 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.