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Product News: Lunati's new Harley Evolution Motor Valvetrain upgrades

August 01, 2013

The following is an industry press release...

Olive Branch, MS (July 2013) – There is no motorcycle more iconic, unmistakable, and rooted in a culture of customization than the Harley Davidson.  Whether built as a decked-out street cruiser, wild chopper, or all-out racer, Harley owners all share a passion for making their bikes uniquely their own.  Continuing this tradition of modification, Lunati now offers a complete range of valvetrain upgrades for 1984-2006 Harley Davidson Evolution Big-Twin and Twin-Cam engines including valve springs and retainers, valve stem locks, and hydraulic roller lifters.

Whether you are adding high-lift camshafts to your Harley or just looking to increase your bike’s durability, upgrading the engine’s valvetrain will help to eliminate the potential for valve float as well as replace factory pieces prone to wear and tear that can cause catastrophic engine damage if they break.  Lunati’s catalogue of valvetrain components are designed to meet your exact needs be it racing or reliability.  For those looking for the ease of an all-in-one solution, Lunati also offers complete Valve Spring Kits that include a matched set of valve springs, retainers, locks, and locators.

Lunati valve springs are manufactured from the finest quality chrome silicon spring wire, precision wound and put through a cutting-edge heat treatment process for long-term reliability.  Available as either a Dual Valve Spring or Beehive coil design, Lunati’s valve springs are heat set to take the load loss out of the springs during manufacturing and to make the break-in process easier.  The Signature Series Ovate Beehive Springs feature a multi-arch wire design and reduced mass in the retainer end for better high-rpm performance, as well as a thinner cross-section wire that gives more coil bind clearance for high-lift applications.

Along with upgraded springs, Lunati also offers upgraded valve spring retainers and valve stem locks.  Its precision-machined 4140 steel retainers are heat treated and hardened to increase strength and wear prevention and are black oxide coated to prevent corrosion.  For serious performance and all-out race engines, Lunati also offers titanium alloy valve spring retainers made from premium 6AL4V titanium alloy which offer superior strength coupled with amazing lightness.  Lunati’s precision machined steel valve stem locks are designed to work with Lunati steel or titanium retainers as well as most OE steel valve spring retainers, providing added strength and reliability with high tension aftermarket springs or an extra measure of confidence with factory springs.

Rounding out its valvetrain offerings are Lunati’s Original Equipment replacement and High-RPM Hydraulic Roller lifters for the 1999-2006 Twin Cam Evolution engines.  The replacement lifters are precisely manufactured to exact OE specs and are an excellent choice for mild performance applications or stock rebuilds.  For seriously modified or racing applications, Lunati’s High-RPM lifters are engineered with micro-tolerance internal valving to combat valve float in engines operating at or over 6,500 rpms.

Lunati Harley Davidson valvetrain components are made in the USA and are backed by Lunati’s outstanding Limited Warranty policy.  For more information, visit or call (662) 892-1500.

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