A48-R WP Air System
All KTM and Husqvarna Motorcycles with the new WP AER Air Forks.
MX-Tech A48-R Cap
Tunable Balance Chamber Kit
Leaf Spring Mid Valve w/ piston and shims
BONE Filing Tool
Currently, air fork systems work by using single-volume pressure regions. Air pressure changes depend upon the position of the stroke to change volume. This is similar to a hyper-progressive spring rate, where the air spring is the largest contributor to net force, and the most changed as a function of position.
MXT saw a need to create a more linear force instead of the stock hyper-progressive characteristic, and achieved this by incorporating an additional compression region. The new high pressure region is positioned above the main pressure region, and is separated by a piston. As the main pressure region increases in pressure, it reaches a point at which the separation piston starts to compress. This effectively slows the rate at which the volume change accelerates. MXT engineered this to occur in the middle of the stroke, which limits the progressive nature of the air fork. Finally, near the end of the stroke, the compensation effect of the high pressure region stops. At this point, the pressure dramatically rises, maintaining the original air spring effect which allows for excellent bottoming control.
UPDATE: Kit now comes with a tunable balance chamber feature. This addition allows the effect of the balance chamber to be tuned so riders can increase or decrease the duration of the balance chamber.
Leaf Spring Mid-valve Kit.
To compliment our tuning work on the AER fork, we have developed a highly tunable mid-valve to replace the sharp feeling rigidly clamped stock mid-valve. The MXT Leaf Spring kit breaks the deflection into three tunable regions which can easy adjust lift, spring rate, spring preload, main stack stiffness and sub-stack stiffness. The mid-valve can now be configured for low lift heights, and if desired, very soft shim settings. The deflection is so subdivided, the shims will not fatigue as quickly as typical. Additionally, the system comes with a rebound separator check valve that isolates the rebound bypass from the compression stroke.
BONE TOOL INFO:
BONE Air Filing Tool for both the A48-r and TAC-r air systems includes spare o-rings. The o-rings must remain clean and greased for the o-rings to remain intact. We recommend any light o-ring grease be used. This tool when used with the MX-TECH Air System Caps is a ZERO LOSS SYSTEM. Meaning, once the air system has been inflated to spec and you remove the tool, the air you hear escaping is only the air inside your pump line, NOT THE CAP. If you re-install the tool immediately it will appear that the cap/fitting has lost pressure. This is not the case. The pressure drop is the loss of line pressure. The Schrader valve inside the cap has long since closed BEFORE the BONE is fully unscrewed. You have been warned! :-)