FERREA S10173 Valve Spring for HONDA CRF 450R 2013-2016

Description FERREA S10173 Valve Spring for HONDA CRF 450R 2013-2016

The FERREA S10173 valve spring is engineered as a single-spring assembly manufactured from a special alloy for endurance applications. Designed for the Honda CRF 450R model years 2013–2016, it provides controlled valve operation under high-stress conditions while maintaining durability and consistent performance. The spring delivers defined seat and open pressures for both intake and exhaust sides and supports a maximum net lift of 10 mm.

• Single-spring construction made from a special alloy
• Designed for endurance operation with stable pressure characteristics
• Compatible with Honda CRF 450R (2013–2016)
• Requires Ferrea titanium retainer and dedicated spring seat locators

Specifications:

• Outside Diameter: 21.5 mm
• Inside Diameter: 15.10 mm
• Seat Pressure: 55 lbs @ 35.5 mm (INT) / 60 lbs @ 37 mm (EXH)
• Open Pressure: 130 lbs @ 25.5 mm (INT) / 135 lbs @ 27 mm (EXH)
• Rate Inch: 190 lbs
• Coil Bind: 22.0 mm (INT) / 25.5 mm (EXH)
• Max Net Lift: 10 mm
• Required Components: Ferrea Titanium Retainer #E12038; Spring Seat Locator (INT) #SL1166 / (EXH) #SL1167