Kibblewhite Precision Machining

Flathead valve spring kit

KIBBLEWHITE Precision Machining (KPMI), the well known Pacifica, California based performance valve train component manufacturer, has these replacement  valve spring kits available  for Harley-Davidson 74 and 80" Flathead models from 1930 to 1948.

This O.E.M. style replacement kit is designed to give stock pressures (seat pressure 65# and open pressure #135) and work with stock cam profiles. This kit is manufactured to original O.E.M. specifications using premium modern materials, design protocols and manufacturing techniques.
All of the components in this kit have been designed, manufactured, tested and blueprinted in Kibblewhite's own facility.

Owner Will Kibblewhite, whose father started the business in 1936, has always believe that science of materials is the key that unlocks the door marked 'Performance'. He says that these valve springs are wound from "Super Clean" chrome silicon valve spring wire that has been heat-treated and shot peened. The retainers, keepers and bases are modelled using finite element analysis (FEA) to "maximize mechanical strength."

KIBBLEWHITE PRECISION MACHINING INC
www.kpmi.us