Junior Motocross

The 2018 KTM/Husqvarna ‘WP AER 43’ Air to spring conversion kit (ATS) is aimed to suit all the current 2018 Husqvarna and KTM 85 cc racers fitted OEM with the AER 43 fork.

Recommended spring rate for rider weight ( without gear )

• Rider Weight 35-40kg – 0.60 
• Rider Weight 40-45kg – 0.64 
• Rider Weight 45-55kg – 0.70 
• Rider Weight 55>   kg – 0.72 

Our WP43 ATS Air to spring conversion kit is a complete replacement cartridge assembly for your current WP AER43 AIR Fork setup.  It is designed to completely remove all the Air system from your current WP43 Fork and replace it with a preload adjustable spring and cartridge setup.  High Quality Springs are available to suit varying rider weights.

 Fits 2018-2020 KTM SX and Husqvarna TC85cc racers

Key Features

• Never have to set your air pressure ever again
• Super easy install. Undo top cap , drain oil completely and remove base bolt. Our kit slides in as a complete replacement supplied with spring installed all ready to go!
• Much more reliable fork
• No Fade out or pump up in pressure over long moto’s highly noticable on these 85cc machines. We are measuring 3-4psi over 20 minutes at a high level!
• 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
• Optional Eibach spring to suit this kit
• Instruction

Fork Spring Recommendations  – General Riding and MX Applications

These recommendations  are a guide only as fork Springs are weight and speed dependant.  For example a 44 kg A GRADE ‘Pro level’ rider falls into the .65kg/mm category but may well be better suited to a 0.70kg 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 C level riders or absolute beginners on the 85cc machines. Eg. 42kg rider running a 0.60kg/mm spring for a plusher ride.

Fits:

• KTM Xplor Shocks - ALL

Our Gas Bladder kit Converts your WP XPLOR shock to a Bladder nitrogen system allowing the shock to perform at a high 'Factory' Level.  The Oem Unit in these WP shocks have a floating piston standard that separates the oil and gas from mixing.  The issue with this while it is cheap to produce, generates heat and friction as the piston moves up and down along with the shocks movement when hitting bumps. 

We find a much better feeling and performance from this shock when it is changed to bladder system as found on the Factory WP Trax shock and all Japanese Showa/KYB units.  Making an already great WP shock better.

All Kits are Billet machined and supplied with Genuine KYB bladders internally for a high quality, ease of ordering spares and reassurance.  

Kit includes:

• Bladder Housing
• Circlip
• End cap ( nitrogen needle filled)
• Hex Screw for an extra backup gas Seal 

Fits:

• KTM Xplor Shocks - ALL
• KTM SX85 2018-2020
• HUSQVARNA TC85 2018-2020

Our Gas Bladder kit Converts your WP XPLOR or WP85cc shock to a Bladder nitrogen system allowing the shock to perform at a high 'Factory' Level.  The Oem Unit in these WP shocks have a floating piston standard that separates the oil and gas from mixing.  The issue with this while it is cheap to produce, generates heat and friction as the piston moves up and down along with the shocks movement when hitting bumps. 

We find a much better feeling and performance from this shock when it is changed to bladder system as found on the Factory WP Trax shock and all Japanese Showa/KYB units.  Making an already great WP shock better.

All Kits are Billet machined and supplied with Genuine KYB bladders internally for a high quality, ease of ordering spares and reassurance.  Parts and Bladders near always in stock here.