SPRING, RETAINERS, SHIMS KIT, KIBBLEWHITE 80-80066 RACING, WRF250 01-12, YZF250 01-12

Kibblewhite Racing Valve Spring Kit

This high-performance valve spring kit is engineered by Kibblewhite for racing applications, offering enhanced valve control and reliability for your off-road motorcycle. Designed with a focus on precision and durability, this kit ensures optimal performance in demanding conditions.

The Kibblewhite Racing Valve Spring Kit features:

• Lightweight Racing Valve Springs: Constructed from Super-Clean Chrome Silicon wire for reduced valvetrain mass and improved response.
• Titanium Retainers: Significantly lighter than steel retainers, further reducing valvetrain inertia.
• High-Tensile Steel Lower Collars: Provides a strong and stable base for the valve spring assembly.
• Included Seals: Ensures proper sealing for optimal engine performance.
• High Lift Capability: Engineered for up to 0.380 inches of valve lift.
• Specific Pressures: Offers 40 lbs of seat pressure and 86 lbs of pressure at 0.380 inches of lift for both intake and exhaust valves.

KPMI (Kibblewhite Precision Machining Inc.) employs a scientific systems approach to valve spring kit design. Each component is meticulously engineered to work harmoniously within the complete valvetrain system. Utilizing proprietary design and simulation software, combined with over 70 years of design experience, KPMI ensures that the valve spring's force, natural frequency, and cam profile are precisely matched. This integration considers valvetrain mass, system harmonics, and engine RPM to deliver peak performance and reliability.

The valve spring manufacturing partners are ISO certified U.S. based companies. The premium quality Super-Clean Chrome Silicon valve spring wire used is traceable to its origin in Kobe, Japan, renowned for producing some of the world's finest spring wire. Through rigorous design, simulation, heat treatment, stress relief, and shot peening processes, Kibblewhite delivers world-class valve springs designed for the most demanding racing environments.