Valve Black Diamond™ by Kibblewhite — high-performance intake valve for motocross engines. CNC machined from a monoblock forging in EV8 stainless steel, this valve combines lightness and strength to withstand the rigours of high revs and off-road conditions.
- Construction: monoblock forging in EV8 stainless steel, CNC machining for precise tolerances.
- Surface treatment: special German process applied to a depth of 0.002 with a surface layer of 0.0002, aimed at improving wear resistance and reducing friction compared to conventional finishes.
- Stem: black Nitroneg coating for better abrasion resistance.
- Control: profiles studied through finite element analysis (F.E.A.) and tested on a computerised flow bench to optimise flow.
- Origin: made in the United States.
Main features: tulip angle 16° (intake) — head diameter 33.00 mm (1.299"). Particularly suitable for motocross machines, referenced on models such as the HONDA CRF 250 R / RX (2020‑2021).
Manufacturer reference: 30-33612. Ideal for engine preparations and demanding maintenance, this Black Diamond™ valve is aimed at riders and mechanics looking for quality spare parts designed to last on the track.
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