WP Xact USD48 &
WP Xact USD48 &
WP Xact USD48 &
WP Xact USD48 &
WP Xact USD48 &

WP Xact USD48 'Flow Adjuster' Fork Setup Kit 4T

Regular price $445.00
Tax included. Shipping calculated at checkout.

Experience enhanced control and customization for your KTM Xact USD 48 fork with our latest upgrade kit. Building on the success of our Xplor 'Flow48' adjuster kit, we've meticulously redesigned and expanded it to cater to KTM's latest Xact USD 48 fork. The result is an even more refined and versatile suspension system, offering an improved feel and reataining our successful andsuperior compression adjustments. Say goodbye to compromises - our kit provides plush initial settings with the support needed for tackling larger hits.

Still finding your fork too soft or too firm? After installing this kit, we harness the power of the (FA) 'Flow adjuster' (now in replacement of LHS  rebound adjuster) to control powerful comp adjustments. A mere 1 to 2 clicks in either direction can transform your fork, enabling effortless on-the-fly customization.  Fine tune compression for small bump action remains the same on the top of the USD fork via the oem white clickers. 

Compatible with WP Xact USD 48 forks, this kit includes:

  • Compression 4 Port Pistons with base valving settings pre-installed.
  • RHS - Mid Post inclusing base setting / shims installed and ready to fit onto the OEM shaft.
  • LHS - Flow Adjuster post and mechanism, base shim settings pre-installed.
  • Comprehensive installation instructions.
  • Clicker settings and setup information.
  • Additional optional valving settings for further fine-tuning, allowing adjustments to be made firmer or softer from the base settings.


For optimal performance, we highly advise replacing the stock OEM Cartridge pressure springs with Softer Genuine WP Springs, Available here:

12n / 16n  Pressure Spring 

2 Stroke models we recommend the 12n Pressure Spring 

4 Stroke models we recommend the 16n Pressure Spring Option 

Key Features: Our upgraded setup kit retains the potent 'FA' Flow Adjuster mechanism  providing an extended range of adjustability, from firm to soft.  This system now delivers a more progressive and plush experience within WP's latest USD 48 fork. It excels in both soft, plush settings for wooded and rocky terrain and offers robust support for steep descents and fast drop-offs.

The primary advantage of this kit is the ability to swiftly switch between extreme enduro plush and a firmer setting, all with a feel that can rival high-end suspension setups. Quick, on-the-fly adjustments to compression and trail feel can be achieved within seconds, thanks to key components and rigorous testing on trails and in forests.

Rebound damping remains available in both forks, ensuring even load distribution and an exceptional on-trail feel. Rebound adjustment is exclusively tunable through the RHS fork via the OEM red adjuster on the underside. In most cases, only minor double-click adjustments will be necessary from the base settings. The other rebound adjuster is now solely dedicated to controlling the Flow Adjuster compression, allowing for significant changes in compression to suit varying riding terrain on different days, whether you're at an MX park on Saturday or exploring trails the next day. Flow adjustable compression is your perfect match. 

Key Components:

  1. FA (Flow Adjuster) Mechanism/Post Assembly: Our Flow Adjuster is actuated via the LHS OEM rebound adjuster on the underside. Fine-tuning of compression remains at your fingertips using the top white clickers. The complete "Flow Adjuster" post is designed for effortless installation, replacing the OEM unit without the need for shims or alignment concerns. It comes pre-assembled with our optimal settings for the all-new WP USD 48 fork, allowing you to enjoy a hassle-free setup. This mechanism provides a genuine soft-to-firm adjustment, letting you achieve your desired fork hold-up and eliminate dive in a matter of seconds. With this system, you can fine-tune across a range of 10 clicks, spanning from plush trail riding to a firmer MX-style feel with exceptional hold-up.

  2. Midvalve/Rebound Post Assembly: Designed to replace the OEM unit without the hassle of shims or settings, this post assembly can be easily bolted onto the RHS fork cartridge rod. Setting and valving are already installed to balance with our FA Post in the opposing fork, ensuring seamless integration.

  3. Compression Pistons: 2 x 4-port compression pistons are ready for installation onto the OEM compression posts, complete with valving / shims settings. This design allows for a softer shim setting while providing superior control to prevent blowout and shim fatigue. Our setup sheet includes multiple settings to cover trail riding, soft settings, base settings, and firmer options.

For a hassle-free installation, we offer (for seperate sale) tools including:

-WP Fork Compression removal  Tool

-Clamp Set for the cartridge rod (12mm)

Elevate your KTM's suspension performance with the Krooztune Suspensions KTM Xact USD 48 Fork Upgrade Kit, providing you with unparalleled control and adaptability for an exceptional riding experience.

Service Parts Available via catalog

Fork Seal Kits

Genuine KYB or Premium SKF Kits to complement the finest suspension builds

Genuine Slide Bushing

Friction Free suspension always install new slide bushing at service. Any dirt or build up in the teflon coating causes stiction and binding action

Genuine and Super Smooth

Eibach Ktech WP KYB

Only the best brands of springs. Outside of OEM we recommend Eibach and Ktech to ensure reliable accurate spring rates

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