Kibble White Black Diamond Inlet valveYAMAHA 250 YZ 250 F (CG40) - 2019Ref : KIBW00136A / 09263178

Valve Black Diamond™ by KIBBLEWHITE (manufacturer part no: 80-82312): CNC machined intake valve designed for cross cylinders where every detail matters. Designed for demanding engines, this monobloc EV8 stainless steel valve combines lightness and robustness to withstand the stresses of the track.

• Construction: monobloc forged EV8 stainless steel, precision CNC machining.
• Surface treatment: special German process applied to .002 depth, with a surface layer of .0002, aimed at improving wear resistance and reducing friction.
• Stem: black nitrided coating for better durability and optimized sliding.
• Validation: F.E.A. assisted design and profiles tested on a computerised flow bench for smooth gas passage.
• Specifications: tulip angle 18°, head diameter 31.00 mm (1.221").
• Origin: made in the United States.

Ideal for cross practice, the Black Diamond™ fits on setups where the reliability of intake valves is crucial. Application example: YAMAHA YZ 250 F (2019 - 250 cc). Chosen by tuners for its finishes and dimensional consistency, it effectively replaces original parts when longevity and consistent high-rev performance are sought.