Harley-Davidson® Sportster™1970 to 1983 on Kibblewhite Precision Machining

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All Categories > Motorcycle Valvetrain Components > Harley-Davidson® Motorcycle Valvetrain Components > Harley-Davidson® Sportster™ 1970 to 1983


	Harley-Davidson® Sportster™ 1970 to 1983
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		Lightweight Racing Valve Spring Kits for Harley-Davidson® Sportster™ 1970-1983 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 ...




		O.E.M. Replacement Valve Spring Kits for Harley-Davidson® Sportster™ 1970-1983




		Black Diamond® Valves for Harley-Davidson® Sportster™ 1970-1983 (6) All KPMI Black Diamond Stainless Steel Valves are impregnated by a special German process to .002" deep with a .0002" surface build-up to improve wear properties and reduce friction. This process provides resistance to corrosion and wear that is superior to that developed by hard chromium and electrolysis nickel plating. These valves are light and the profiles provide excellent flow characteristics.




		Valve Guides for Harley-Davidson® Sportster™ 1970-1983 (16) C630 Bronze Guides: We choose to use C630 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. Cast Iron Guides: After chemically separating several samples of cast iron material for analysis and evaluating the test data, we decided to have our own specification of cast iron made exclusively for us. We specify elements such as carbon, silicon, manganese, nickel, chromium, copper and sulfur to produce a highly pearlitic structure with dense fine grains for excellent wear resistance. Search Valve Guides for Harley-Davidson® Sportster™ 1970-1983 - 16 Items




		Valve Seats (Powdered Metal) for Harley-Davidson® Sportster™ 1970-1983 (2) Using the latest developments in powdered metal technology, KPMI’s R&D team was able to create a high density iron based seat with exceptional wear resistance, resistance to microwelding, and excellent thermal qualities. The seats are tall, offered in several sizes, and have ample material on the ID for shaping, making them universal in application. They allow the builder to repair damaged seat bores and to increase the seat size for larger valves. The ODs are ground for a smooth surface finish that offers maximum contact with the seat bore for optimum heat transfer. KPMI seats have a generous radius on the leading edge to prevent galling during installation. This material is compatible with all types of fuel blends, resists ...




		Wrist Pin Bushings for Harley-Davidson® Sportster™ 1970-1983 KPMI has developed what we believe to be the highest quality wrist pin bushings available. Our wrist pin bushings are machined from a proprietary bronze alloy, with an exceptional Rockwell hardness rating. These bushings are a must for all rebuilds and high performance applications.




		Clutch Springs for Harley-Davidson® Sportster™ 1970-1983




		Rocker Arm Bushings for Harley-Davidson® Sportster™ 1970-1983 Rocker arm bushings need the correct combination characteristics to perform properly in their high load environment. KPMI tested and analyzed several bearing-bronze materials for anti friction qualities, hardness, and resistance to deformation under high loads. Our bronze rocker bushing material meets the high standards we set for success in all of these areas. KPMI Rocker arm bushings are held to tight dimensional tolerances, have an excellent surface finish, machine well, and have a tapered lead on each end to ease installation.

Harley-Davidson® Sportster™ 1970-1983


	20-2210 Lightweight Racing Valve Spring Kits for Harley-Davidson® Sportster™ 1970-1983 $221.65

	20-20440 Valve Spring Kit for Harley-Davidson® Sportster™ 1970-1983 $162.87
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