Kibble White Black Diamond Exhaust valveRef : KIBW00135A / 09263163

Valve Black Diamond™ — KIBBLEWHITE (ref. 80-80916)

Designed for Cross and Supermoto machines, the Black Diamond™ valve is a high-quality intake/exhaust component intended for demanding cylinder heads. CNC machined from a monobloc forging in EV8 stainless steel, it combines lightness and strength with an optimised profile for excellent gas flow. Each element is designed using finite element analysis (F.E.A.) and validated on a computerised flow bench to ensure consistent and high-performance profiles.

• Application: Exhaust
• Material: EV8 stainless steel, monobloc forged
• Surface treatment: German process at 0.002" depth with a surface layer of 0.0002" — improves wear resistance and reduces friction, offering superior protection compared to chrome or electrolytic nickel plating
• Stem: black Nitroneg coating
• Tulip angle: 30°
• Head diameter: 0.984" (25.00 mm)
• Manufacturing: United States

Ideal for teams and DIY enthusiasts looking for a hardened and precise exhaust valve, compatible notably with YAMAHA YZ 250 F (models 2016–2018). Reliable Kibblewhite part for maintenance or engine preparation.