H-D Flathead valves and guides
KIBBLEWHITE Precision Machining is well known for its line of performance valve train products, but it also caters for the vintage market and as such has cast iron guides for use in H-D Flathead engines. The cast iron guides are claimed to offer excellent wear resistance, which allows for a superior bore finish that is easy on valve stems.
To accompany the guides, Kibblewhite has a version of its Black Diamond valves. The valves are one-piece, 21-4N stainless steel forgings, which are impregnated by a special German process to a depth of .002in, with a surface build-up of .0002in. This process, which gives the valves their Black Diamond name, is said to improve wear properties, reduce friction, and provide resistance to corrosion and wear when compared to chrome and nickel electrolysis plating.
Additionally, each Flathead valve has stellite welded to the tip to prevent wear from impact and abrasion. Kibblewhite states that it chose to weld stellite rod to the tips rather than friction weld a hardened wafer, because wafers can crack and cause failures.
KIBBLEWHITE PRECISION MACHINING INC
Pacifica, California, USA
Tel: 650 557 2046