Stock XACT / AER 48 FORK

Kreft Moto has identified the following performance issues with the stock XACT/AER fork:

• Hyper-progressive spring curve. XACT/AER48 relies largely on spring force to control travel usage and prevent bottoming. While the fork has excellent bottoming resistance, this approach has drawbacks. Spring force is position-sensitive, not speed-sensitive, so the fork exerts the same force at a given point in the travel regardless of the size of the bump. Shim-controlled valves have the unique ability to create damping force in proportion to the impact force, which is a great advantage in dissipating the energy efficiently – which is to say, in the plushest way possible. The highly progressive spring curve is a major reason why XACT/AER48 feels plush at the top of the stroke, but harsh deeper in the travel.
  

• Rides too high in the stroke. For the reasons described above, AER48 needs to ride high in the stroke to feel compliant. However, the excessively tall ride height causes poor cornering traction, inaccurate line tracking, and an unsettled, "dancy" feel at the front wheel.
  

• Oversimplified mid-valve (XC and XC-F models). AER48 uses a check spring type mid-valve in place of a traditional shim stack. A single wave spring and check shim controls fluid flow through the valve. This configuration reduces assembly time, but also reduces consistency, durability, and our ability to tune the valve. It also contributes to a "blow-off" feel that makes the fork less sensitive to small bumps but use travel rapidly on larger impacts (again, relying on the air spring to control travel usage).
  

• Air spring failures (2016.5 and 2017 models). AER48 uses a poorly designed air spring piston seal, which can lead to air spring failure.

OUR SOLUTION

Kreft Moto’s performance tuning for the WP XACT & AER48 includes the following improvements:

• ReValve Control (RC). Our revolutionary external revalve system.

• Kreft custom valving. Meticulously engineered, with critically-acclaimed performance.

• Neutral ride height. Our revised spring curve and damping modifications allows us to specify lower air pressures and create a more free-moving feel in the initial stroke. The added negative travel enhances traction by helping the wheel remain in contact with the ground. It also improves cornering confidence with a reliable turn-in feel and calm, "no-hands" line tracking.

• Refined mid-valve (XC and XC-F models). By replacing the check shim with a traditional multi-layer shim stack tuned to our specifications, we can control compression damping with much greater precision.

• New air spring piston seal (2016.5 and 2017 models). This seal eliminates air spring failures.

ready to ship?

Once you fill out a Rider Info Form (RIF) and place a $500 deposit, we can send you our custom Kreft Moto shipping box and an initial outgoing shipping label totally free! Click here for more information.