Description
Stock valve springs wear down under aggressive riding, causing valve float and losing power when you need it most. The Wiseco SVKB4335 replaces your worn intake and exhaust valves with premium steel units and precision-engineered springs rated for sustained high-RPM performance. This is a complete refresh kit—not a patch—that restores your KX250F or RM-Z250 to factory spec and beyond, with extended service life to keep you competitive.
Whether you’re refreshing an engine after hard racing or building a fresh top-end, this kit delivers the reliability and durability that separates winners from the rest. Installation is straightforward with proper tools and clear guidance included.
- Complete intake and exhaust valve set
- Premium steel valves, OEM-sourced
- Precision-engineered valve springs
- High-load rated for steel valves
- Includes moly paste assembly lubricant
- Extended service life design
- Fits 2004–2006 KX250F and RM-Z250
- Meets OEM performance standards
