KPMI 2001-2013 YAMAHA WR250F BLACK DIAMOND INTAKE VALVE 80-80075

INTAKE and EXHAUST VALVES

VALVE SPRING KITS

Black Diamond™ Valves:

All KPMI Black Diamond™ stainless steel valves are impregnated by a special German process

to a depth of .002”, with a surface build up of .0002”. This “Black Diamond™” process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Black Diamond™ Valves are light, strong, one-piece forgings with profiles that provide excellent flow characteristics.

White Diamond™ Valves

We fully CNC machine our White Diamond™ Valves from a one-piece forging of either EV8 Stainless Steel or Inconel -751. These materials have proven heat and corrosion resistance properties. A 360-degree anode is used to produce the highest possible grade of hard chrome finish. White Diamond Valves are light, strong, one-piece forgings with profiles that provide excellent flow characteristics.

KPMI® O.E.M. Replacement Tensilite® Titanium Valves

       KPMI® Recommended OEM Replacement Valves
       Exceeds OEM Specifications
       Your OEM Alternative
       Compatible with O.E.M. Spring Kits

    KPMI® has recognized a need for direct OEM replacement valves that meet KPMI® standards for race quality performance and endurance, while also being affordable. To meet this need KPMI® has new product line selected from existing or newly developed KPMI® valves for select applications.

    If you look closely at the KPMI® Tensilite® titanium valves, you will notice the U.S. milled one piece forged design, precision ground stems and the CrN PVD coating covering the entire valve. In cases where the OEM uses steel exhaust valves, KPMI® has elected to implement our race proven line of Black Diamond™ stainless steel exhaust valves, rather than create a new line of valves made from a lesser quality material to match the OEM. For your next factory rebuild, upgrade to KPMI® and gain yourself some performance and reliability, while saving yourself some money.

    Note: These valves are intended as O.E.M. replacement valves and are completely compatible with the O.E.M. spring kits. However, experienced engine builders, who are running aggressive camshafts or higher than factory RPM’s may find the combination of the O.E.M. Style Valve and KPMI’s Lightweight Racing Spring Kits advisable.

KPMI Valve Springs:

KPMI® valve springs are wound from Premium Kobe Super-Clean Chrome Silicon Wire. KPMI® valve springs are heat-treated, stress relieved, and shot peened to insure maximum performance and life.Springs are engineered for each specific application using proprietary advanced spring design simulation, and analysis software. Engineers pay special attention to cam and spring harmonics, stress, mass, and operating rpm.

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.† = Must use KPMI® Spring Kit when using Black Diamond™ Valves