Race Tech Gold Valve and Fork Spring Kit for Harley-Davidson 39mm Fork

A Race Tech Suspension rear suspension kit with firm springs designed for Sportster scrambler and Harley off road bikes.

Assorted mechanical springs, including Race Tech Suspension Gold Valve & Fork Spring Kit (.80KG) Fits Sportster & Dyna 39mm, and fasteners displayed on a white background optimized for suspension performance.

Various Race Tech Gold Valve & Fork Spring Kit (.85KG) Fits Sportster & Dyna 39mm suspension performance springs and hardware components laid out on a white background.

$349.99

Type

.80kg Spring Rate

.85kg Spring Rate

.90kg Spring Rate

.95kg Spring Rate

Low stock - 3 items left
Inventory on the way

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Product Videos

Race Tech Gold Valve and Fork Spring Kit For Harley-Davidson 39mm Fork

Turning that Sporty into a Scrambler? Do a lot of two-up riding? Not every riding situation is the same as what the factory planned for.

Make damping rod forks perform like well-tuned cartridge forks
Tunable valves sit on top of damping rods; held in place by the main springs
Simple to install and tunable for all conditions and rider preferences
Proudly made in the USA
Available in multiple spring rates for various riding scenarios
Kits contain cartridge emulators, springs, spacer material (if necessary) and all internals required to convert your damper fork to a cartridge-type valving system
Seal kits (required for installation) are available separately
Seal kits with bushings are available separately; these may be required for high mileage or badly-neglected forks
Fork caps available separately
Detailed instructions are included

The factory suspension is a compromise for many styles and built to a price point. If you want the classic looks of a 39mm narrowglide fork but want to pack some heat "under the hood," Race Tech Gold Valve and Spring kits from TC Bros. are the complete solution. Especially if you're rebuilding a fork with a set of our fork tubes, why not improve the internals?

Race Tech's cartridge emulator kits are the benchmark for keeping stock appearance but ratcheting up the performance. The heart of the kit is the spring; Race Tech offers several options to ensure you get the appropriate rate for your scenario and preferences.

The Gold Valves, known popularly as cartridge emulators, offer tunability that the factory suspension can't. Conventional damper rod forks offer primitive damping control that's not very dynamic; it's difficult to make this type of suspension perform well at both high and low cycling rates. Coupled with springs that are often inappropriate, it's no wonder that a stock 39mm fork leaves something to be desired performance-wise. Cartridge emulators are how you convert your damper rod setup behave like a modern upside-down suspension—the valving responds to the speed of the tubes during their stroke.

Don't swap your fork. Make the narrowglide you have be all it can with internals from Race Tech!