ProX 28.SIS2414-1 Steel Intake Valve Conversion Set for Yamaha YZ250F

Latest addition to the ProX program is the Steel Intake and Exhaust Valve & Spring Kits. This kit is offered as an alternative where the OEM application uses Titanium valves. ProX has now developed the Steel Intake and Exhaust Valve & Spring Kits, containing a set of steel intake or exhaust valves plus a set of specially designed stronger valve springs. The ProX kit just replaces the OEM valves & valve springs and can be installed using the OEM retainers, bases and valve seals.

The ProX 28.SIS2414-1 Steel Intake Valve Conversion Set provides a durable replacement for Yamaha YZ250F applications originally equipped with titanium intake valves. This complete kit includes steel intake valves and specially developed stronger valve springs designed to accommodate the additional weight of steel valves. It is an efficient option for engine rebuilding, maintenance, and performance applications where increased valve durability is desired.

ProX nitrided steel valves feature high microhardness and a smooth surface finish that helps reduce friction between the valve stem and guide. The premium chrome vanadium steel valve springs are engineered for reliable performance and durability at high RPM. The conversion set is designed to replace the original equipment valves and valve springs while retaining the OEM retainers, spring bases, and valve seals, eliminating the need for additional engine modifications.

This ProX intake valve conversion set fits 2014, 2015, 2016, 2017, and 2018 Yamaha YZ250F motorcycles. Supplied as a complete replacement package, the ProX 28.SIS2414-1 kit supports a straightforward installation and dependable service life under demanding riding conditions. Verify the model year and engine application before installation.

Features:

• Steel intake valves provide increased durability and reduced wear under extreme operating conditions
• Nitrided valve surfaces deliver high microhardness and a smooth finish to help reduce stem-to-guide friction
• Specially designed stronger valve springs compensate for the increased weight of steel valves
• Compatible with OEM retainers, spring bases, and valve seals without requiring additional engine modifications
• Chrome vanadium steel springs provide reliable performance and durability at high engine speeds
• Complete conversion package supports quick, practical, and cost-efficient valve replacement
• Fitment: 2014-2018 Yamaha YZ250F
• Brand: ProX
• Manufacturer part number: 28.SIS2414-1
• Vendor part number: 19-9548-1

Fitment:
2014 Yamaha YZ250F
2015 Yamaha YZ250F
2016 Yamaha YZ250F
2017 Yamaha YZ250F
2018 Yamaha YZ250F