KPMI takes a scientific “System” approach when designing our Valve spring kits. Each component is designed to work with the others as part of the complete system. KPMI’s engineers use our proprietary design and simulation softwares, and draw on our 70+ years of design experience to create these systems. Our design, simulation, and manufacturing processes insure compatibility of the valve spring’s force and natural frequency with the cam profile, valvetrain mass, system harmonics, and the engine RPM.
Our spring manufacturing partners are U.S based companies that are ISO certified. The Super-Clean Chrome Silicon valve spring wire we use is traceable back to Kobe Japan where some of the best spring wire in the ...
(4) 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. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are light, strong, one piece forgings with profiles that provide excellent flow characteristics.
(6) We choose to use C63000 nickel bronze as a material to make valve guides because of its ideal characteristics for the application. The 4-5 percent nickel content produces superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity.
Honda® CB™ 350 Twin CL/K2 1968-1973
30-30361 Black Diamond™ Valves for Honda® CB™ 350 Twin CL/K2 1968-1973 $57.82
30-30362 Black Diamond™ Valves for Honda® CB™ 350 Twin CL/K2 1968-1973 $57.82