AER Solutions

The KTM and Husqvarna  WP48 Air to spring conversion kit is aimed to suit all the range of KTM's and Husqvarna that come equipped with the WP48 AER fork as standard.  This includes Ktm's SXF, SX ,XC and XCF models as well as Husqvarna's equivalent bikes in the FC, TC,TX and FX range. 

If its got WP AER48 forks in your bike as OEM equipment , this kit will fit. No need to ever set air pressure again, transforming front end feel, corner entry and less pressure / spring rate variables whilst riding over long distance.

Install Video:

Our WP Air to spring conversion kit is a complete replacement cartridge assembly for your current WP AER setup.  It is designed to completely remove all the Air system from your current WP AER 48 fork  and replace it with a preload adjustable spring and cartridge setup.  High Quality German Engineered ‘Eibach’ Springs are available to suit varying rider weights.  Please advise upon order which spring you require (see recommendations below) or let us know your weight and speed  and we will recommend the best spring for you. 

This kit fit's in minutes.  If you can pull down and service your fork seals on the WP AER 48 fork you can install this kit. Info and instruction included.

Spring Rate Recommendation 

 250F and 2 Strokes 

450F 

General riding & Motocross applications

These recommendations  are a guide only as fork Springs are weight and speed dependent. For example a 72 kg Pro rider falls into the 0.88kg/mm category but may well be better suited to a 0.92kg spring due to the much higher corner entry speed and the ability to hit large bumps at high speeds. Please note this guide is for rider weight ‘without’ gear.

Please note we have had great results using one spring down for Veteran/ C level riders on the 450 machines.  Eg. 90kg rider running a 0.96kg/mm spring for a plusher ride.

For more accurate advice please consult your local suspension tech or send us an email.

 Rider weight Spring Recommendation ( Pro Level riders may consider one rate harder than recommended due to the faster speed and need for 'hold up')

Key Features

• Never have to set your air pressure ever again.
• Much more reliable fork
• Super smooth action resulting from our tested spring guidance system. 
• Hydraulic Bottoming resistance using our tapered bottoming piston and seat.
• No Fade out or pump up in pressure over long moto’s
• A Constant feel in your front end that  is more consistent throughout the ride
• Spring Pre load adjustable minimal tools are required for fitment. If you have the Fork cap and basic tools to remove the standard OEM Air cartridge you will have the ability to fit up our kit.  Our cartridge kit is made from High grade 6061 Aircraft Grade Alloy , Chrome Moly rods and Anodised for a Factory Finish. Instruction manual included.

Parts included in the kit

• Fully Complete Cartridge assembly including Bottoming Cone and preload washers 
• Optional Selected Eibach spring to suit this kit

Fits 2017-2020 Ktm / Husqvarna AER fork.

A complete piston kit to suit all AER48 forks.  This piston allows the compression shims to float (similar to Showa and KYB units) allowing instant plushness and rider feel.  We are using the OEM piston in pro level setups ( MX National Level) that need the superior hold up over very big bumps at speed.  This is not the majority!

From low A right thru to Vet level and juniour racers this kit allows a more forgiving fork that can be tuned from soft offroad right up to senior mx.  

Kit includes:

• Piston and top plate
• Shim stack rebound ( inc optional setting)
• Shim Stack Compression ( inc optional setting)
• Base plate 
• Mid Comp Spring
• Preload washer ( under spring ) 
• Instruction and Setting sheet to adjust base setup 
• Optional setting inc for Light and heavy rebound settings
• Junior , Offroad , Vet MX and pro MX setting supplied.  

**Piston kit only** Shown installed on WP OEM shaft for demonstration purpose only

Kits available for all WP AER and Xplor Forks.  KYB kits are ready to go with a B level Setting to suit MX in AER and Offroad in Xplor setting.

 Contact us now to inquire about a KYB cartridge kit pre set and valved specifically for you .  Rider weight, spring rate selected and valving settings installed at no cost prior to shipping.  Kits and Genuine Springs near always in stock.

• Convert your WP AER48 forks into KYB AOS Spring Forks - 

• Maintains the flex of the original inner and outertubes that has been designed for KTM/Husqvarna frames -

• The KYB feel combines perfectly with the KTM/Husqvarna character, giving it a very smooth feel, eliminating the harshness while building up a progressive damping profile toward the end of the stroke -

• Every individual cartridge kit fitted will be setup here at krooztune to suit Australian rider condition and speed.

• Personal setting based on the riders weight and bike

This Kit Includes:

2 x Cylinder Assemblies

2x Compression Base Valve Assembly 

1 Set of billet axle Brackets

2 x Oil Lock / Hydraulic stop

1 x set of fork springs ( rated to weight / speed)

2 x Litre KYB oil 

Please call or email the shop to organise a pre booking to have this kit installed and setup exactly for your needs.  Please email krooztune@krooztune.com or thru contact page  for any inquiry