Kibblewhite valvetrain system for M-8
Leading Californian valvetrain specialist Kibblewhite Precision Machining (KPMI) has brought a slew of product design updates to the market for Harley’s Milwaukee-Eight Touring model engines.
Wound from a blend of chrome silicon wire designed specifically for performance valvetrain, KPMI high-performance replacement and high lift beehive spring kits allow the choice of aggressive cam profiles, with lifts of up to .550” for performance builds that the stock springs wouldn’t be able to cope with reliably.
Its heat-treated steel retainers provide excellent durability and life expectancy and weigh only 2 g more than their titanium equivalent, but titanium retainers are offered for performance applications that require the lightest possible high strength parts available.
KPMI ‘Black Diamond’ intake and exhaust valves are said to offer combined weight savings of approximately 6.8 g over the OEM components, reducing wear and tear on the rest of the valvetrain and allowing the engine to rev higher. KPMI also offers ‘White Diamond’ Inconel exhaust valves for extreme duty applications with high exhaust gas temperatures.
Kibblewhite’s C630 nickel aluminum bronze guides extend the life of an engine build by providing greater wear resistance and heat dissipation than the OEM guides they replace. Manganese bronze and cast iron guides are also available as OEM replacements, which offer greater ease of installation and sizing than the C630 counterparts (a specially sized KPMI reamer is available).
All KPMI intake guides have port geometries with reduced cross sections for increased air flow; their OEM replacement keepers and valve stem seals are kept in stock dimensions.
KIBBLEWHITE PRECISION MACHINING