Performance: The Tank system features a 2mm larger dimeter piston reducing the effect of both the temperature change in the shock, and the impact on rode charge. The piston now moves more slowly, and less overall.  Optimized O-ring gland design reduces stiction, and the piston incorporates a piston ring resulting in greater compliance, traction, and comfort for the rider.

Tuning options: The piston features a standard Ohlins positioning nipple. This allows the shock piston to be precisely placed and measured, giving tuners the option to control the effective volume change on the gas side for super consistent builds.

Easier Service: The end cap can be removed via a circlip design, allowing the piston to be removed during routine service without removing the cylinder. The system can be configured with either a shrader valve, or a high quality stainless needle gland fitting. This makes the design easy, compact, and 100% reliable.

Quality: Like anything MXT makes, the quality is second to none. The parts are machined from 7075 T6 aluminum and anodized.

Fitment: 2015 Factory Edition KTM’s and all 2016 KTM and Husqvarna models with newer chassis.

DIY Skill level: Intermediate



WP AER48mm Forks (Including aftermarket replacement.)

All KTM with AER48

All Husky with AER48

The innovative MXT A48R system is the first true off-road air fork that helps manage the hyper-progressive nature of all production air forks. The MXT A48R has been in development for an extensive period of time.

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.



Parts includes:

KYB mid-valve check valve

Mechanical O-ring

Midvalve post

WP AER mid-valve piston

Preassembled mid-valve baseline shims stack

Dal Soggio Sphere

SPHERE HYDRAULIC CARTRIDGE is an innovative, high performance hydraulic cartridge for demanding racers by Dal Soggio. Excellent for offroad and motocross applications. 

Why choose SPHERE?

The answer is very simple. This particular sealed and pressurized cartridge considerably increases precision and sensibility of the front end, giving better feel and bump absorption. The components are both high quality and built to be durable. With high quality coatings, precision in house machining, and settings developed to win you won’t be disappointed.

Which model of front fork is available?

SPHERE is available for all the following models and more to come: WP AER, 4CS, WP OPEN, SACHS, MARZOCCHI, SHOWA 49mm TAC And KAYABA PSF2

Inquire with N2Dirt about installation, springs, service, and settings.


Our Testing/Review With Motocross Action Magazine



Dal Soggio XP-One Kit

High performance kit to upgrade you 2017 KTM and Husky WP Xplor Fork on Enduro models.

This kit adds the parts that were left out of the fork to provide better performance.

DLC Coating

DLC coating (Diamond like Carbon) DLC coated inner tubes greatly reduces the friction, which provides smoother action over sharp impacts. The DLC coating is also harder and smoother than the standard chrome, and resists nicks from rocks that can create sharp nicks into surface which in turn cuts the oil seals that can turn into leaks.

Pricing includes removing and installing fork lugs. (some lugs may be damaged when removed and will need to be replaced).

Fork Overhaul/Rebuild

Front fork is completely disassembled, ultrasonic cleaned, and inspected. Worn parts are replaced, damaged shims are replaced in stock configurations (standard settings are retained). Front fork is reassembled using genuine parts and high quality racing fork oil.

Fork Revalve

Please fill out our rider data sheet HERE to determine what needs to be done, the fork is completely disassembled, cleaned and inspected. Worn parts are replaced, then modifications to the damping system are done based on our interpretation of what the rider needs. The fork is reassembled using genuine parts and oil level is set.

Fork Springs

SiCr Fork Springs (Sold in pairs)
Showa, KYB, & WP

Available Spring Rates:
.36 kg/mm – .54 kg/mm (.02 kg/mm increments)

Available Showa SFF Rates:
1.00 kg/mm – .105 kg/mm

Four Stroke Engine Rebuild

With years of experience rebuilding engines N2dirt won’t just get you back on the road we can keep you from needing costly repairs in the future. All of our teardowns are cleaned, all crucial measurements are taken and any wear parts are replaced. We do a complete blueprint of the engine to make sure that all specifications are correct. With extensive parts knowledge we can guide you on the proper parts and provide them at a fair price. OEM or aftermarket.

Total cost = Base Pricing + parts

Hard Anodizing – Fork Tubes

Fork upper tubes anodized. Not a performance gain but this will make your bike stand out from others. We offer glossy black, clear, and matte black.

Kashima Coating – Shock Body

Kashima Coat is a proprietary hard anodizing process that involves lubricating molybdenum disulfide deposited via electrical induction into the billions of micro-pores on the surface of hard-anodized aluminum for better lubrication and less abrasion and wear. This can only be done in Japan so check with us for a core swap or plan on 6-8 weeks down time for shipping and treatment.

Price is with good core swap only.