KroozR WP AER 35mm Air Fork to Coil Spring Conversion Kit for 2021-on KTM / Husqvarna / Gas Gas 65cc Junior MX Racers

The Dual Spring Conversion Kit is a complete replacement cartridge assembly for your current WP AER35 Air Fork setup. It is designed to completely remove all the pneumatic system from your current WP Forks and replace it with a traditional preload adjustable coil spring and cartridge setup.

This design enables bigger changes of adjustment form Hard to Soft in both rebound and compression damping as well as removing the 'stickiness' of the OEM forks. This enables us to offer a kit that is easily adjusted to suit all levels of rider.

The key to noticeable damping adjustments is in our already popular and proven compression 'Flow Adjuster'. This mechanism is engineered into the fork cartridge on the left hand side compression leg and offers a 're-valve' like feeling just with simple clicker adjustment on the fork cap. From a super plush easy fork action suited to beginners straight to a fork with hold up and smooth operation to suit the faster A-Grade riders in seconds. Easily adjusted on the comp side fork cap in seconds - it has fine machined increments to achieve fine and accurate settings.

This fork kit is also rebound adjustable but we find that not as much adjustment is required across the common spring rates from our recommended setting.

Parts included in the kit:

• 2 x Complete Cartridge Assemblies
• Optional Coil Springs (to suit rider weight)
• 2 x Fork Caps including preload washer installed
• 2 x Fork Tube Guide Bushes
• Preload Washers and O-Rings
• Specification Sheet including Clicker Settings, Oil Heights and Shim Valving Arrangement (pre-installed)
• Installation Instructions

Install Tools are also available here:

Complete Tool Kit (All 3 tools)

Install Multi Tool 

35mm Tube Clamp

27mm Cartridge Clamp

Key Features:

• Never have to set your air pressure ever again
• Flow Adjuster mechanism installed to compression leg offering superior compression adjustments over our competitors
• Ease of tuning for various rider speed and levels
• 'Senior' level Hydraulic bottoming system fitted
• Coil Spring guides offer a smooth quiet spring fork operation
• Super easy install - undo top cap then drain oil completely and remove base bolt. The 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 motos - highly noticable on these 65cc 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
• Spring fork cartridge kit is made from high grade 6061 aircraft-grade aluminium alloy with chrome moly rods and anodised for a factory finish
• User manual included

Fork Spring Rate Recommendation

Fork springs need to be purchased to match this kit. These recommendations are a guide only as fork Springs are weight and speed dependent. Please note this guide is for rider weight without gear.

For more accurate advice please contact us.