Kayaba Replacement Coil Spring Cartridge Conversion Kit - WP AER 48mm Air Forks

We Customise To Suit You

When you order your motorcycle suspension through Teknik we take the time to make sure it suits your purpose. Select your options below and we will build to your required specifications.

Available Options
Fork springs (43.5-470)

International Product Support

International Product Support

Australian Owned & Operated

Australian Owned & Operated

Suspension Experts

Suspension Experts

Same Day Dispatch

Same Day Dispatch

We Ship Worldwide

We Ship Worldwide

WP to KYB Fork Internals Conversion (Fits WP 4CS / AER / XPLOR Forks)
Black Axle Feet

All parts included as per photo - including 24mm cartridge from YZ250F 2014-2018 and springs
This is a complex kit to install - so we suggest professional fitment only

Kit uses 43.5 x 497mm fork springs for AER length - please select the rate you require from the drop down

If you require this kit for XPlor forks the length is 17mm shorter - so a spacer needs to be fitted in the cartridge and a shorter fork spring used (Stock XPlor has 470mm length spring)

SKU	KITWPKYB48
Shipping Weight	5.0000kg
Shipping Size	0.800 x 0.200 x 0.200m
Unit Of Measure	ea

If your Motorcycle is listed below, this product will suit:

Related products

KYB Cartridge Kit for WP XPLOR 48 Front Fork

2 In Stock

KYB Cartridge Kit for WP XPLOR 48 Front Fork

Genuine KYB Factory Race Parts(SKU: 162018002601)

$2,868.58

XPLOR Fork Upgrade Kit for WP XPlor 48mm Forks

9 In Stock

XPLOR Fork Upgrade Kit for WP XPlor 48mm Forks

KTM & Husqvarna & GasGas 125 / 250 / 350 / 450 / 500(SKU: 30-160-01)

$745.00

Shock Absorber Bladder Upgrade - WP XPLOR PDS 49mm

55 In Stock

Shock Absorber Bladder Upgrade - WP XPLOR PDS 49mm

2017+ KTM & Husqvarna XPLOR Rear Shocks(SKU: 30-049-00)

$165.00

Krooztune WP AER48 Complete Midvalve Float Post Assembly

3 In Stock

Krooztune WP AER48 Complete Midvalve Float Post As

Proudly made in Australia(SKU: KT-WPAER48CMFP)

$295.00

More From This Category

Fork Outer Tube Bare - Kashima Coating - 43mm - Tenere 700 2019+

2 In Stock

Fork Outer Tube Bare - Kashima Coating - 43mm - Te

Original KYB Japan Motorcycle Suspension Parts(SKU: 110754309101)

$619.96

Lainer Showa Free Piston set Honda CRF250 2013-2014

2 In Stock

Lainer Showa Free Piston set Honda CRF250 2013-201

(SKU: SHOWA_FREE_PISTX2_38X10)

$275.00

48mm KYB SKF Mud Scraper

3 In Stock

48mm KYB SKF Mud Scraper

Removable Scraper(SKU: KIT-MS48KM)

$55.00

WP to KYB Axle Lug set. 48mm KTM Husqvarna Gas Gas 2015-

1 In Stock

WP to KYB Axle Lug set. 48mm KTM Husqvarna Gas Gas

Flat bottom type bottoming cones/hydraulic locks. (SKU: 30-152-01)

$880.00

SKF Glide Kit for WP 48mm AER Forks

2 In Stock

SKF Glide Kit for WP 48mm AER Forks

48 WP KTM Husqvarna GasGas(SKU: SKF-GK-WPAERPLUS)

$274.99

FF SPRING PERCHES SHOWA 49mm (Holes Pair)

1 In Stock

FF SPRING PERCHES SHOWA 49mm (Holes Pair)

CRF250 450 2017- KX450 2019- RMZ450(SKU: SDETCV25-Set)

$261.95

5mm Fork Preload Spacers for 25mm cartridges SDEFSP25-25

9 In Stock

5mm Fork Preload Spacers for 25mm cartridges SDEF

2.5 mm PAIR(SKU: SDEFSP25-25)

$10.00

Fork Preload Washer 37.3 x 28.3 x 1.5

5 In Stock

Fork Preload Washer 37.3 x 28.3 x 1.5

37.3mm od x 28.3mm id x 1.5mm thick - Steel(SKU: 30-130-17)

$6.60

KYB Factory Axle bracket KIT KTM/Husqvarna 15-2025 Right

1 In Stock

KYB Factory Axle bracket KIT KTM/Husqvarna 15-2025

Genuine KYB Factory Race Parts(SKU: 60012040)

$474.05

Krooztune Yamaha YZ85 Fork Performance Upgrade Kit

4 In Stock

Krooztune Yamaha YZ85 Fork Performance Upgrade Kit

Proudly made in Australia(SKU: KT-YZ85FRK)

$299.00

Krooztune WP XPlor 48mm FA48 Fork Flow Adjuster Kit - Gen2 - 2017-2018

2 In Stock

Krooztune WP XPlor 48mm FA48 Fork Flow Adjuster Ki

Proudly made in Australia(SKU: KT-XPLORFA2-17)

$595.00

SDI Elite Front Fork Free Piston Aluminium -Showa (Single)

1 In Stock

SDI Elite Front Fork Free Piston Aluminium -Showa

SDI Elite Free Piston Assembly - SFF Forks(SKU: 30-004-15)

$132.00

Krooztune Xplor Fork and Shock Lowering Kit - KTM EXC

23 In Stock

Krooztune Xplor Fork and Shock Lowering Kit - KTM

Proudly made in Australia(SKU: KT-XPLORLK)

From $139.95

WORKS HONDA CRF 250/450 2017-25 Upgrade kit

2 In Stock

WORKS HONDA CRF 250/450 2017-25 Upgrade kit

Quality and looks !(SKU: KTWHON001)

$2,858.89

YZ/KX 85 Shortened Spring Guides

4 In Stock

YZ/KX 85 Shortened Spring Guides

For YZ/KX Bottoming Kit - Part #30-004-02(SKU: 30-004-42)

$44.00

48mm WP SKF Mud Scraper

3 In Stock

48mm WP SKF Mud Scraper

Removable Scraper(SKU: KIT-MS48WP)

$55.00

Fork Preload Spacer 41.8x31.8x3mm

7750 In Stock

Fork Preload Spacer 41.8x31.8x3mm

41.8mm od x 31.8mm id x 3mm thick - Steel(SKU: 24-014-03)

$1.50

KYB Cartridge Kit for WP XPLOR 48 Front Fork

2 In Stock

KYB Cartridge Kit for WP XPLOR 48 Front Fork

Genuine KYB Factory Race Parts(SKU: 162018002601)

$2,868.58

Krooztune WP 35mm AER Air Fork to Coil Spring Conversion Kit - KTM / GasGas / Husqvarna 50cc

7 In Stock

Krooztune WP 35mm AER Air Fork to Coil Spring Conv

Proudly made in Australia(SKU: KT-WPATS-AER35)

From $249.95

Fork Preload Kit (39-42mm)

1263 In Stock

Fork Preload Kit (39-42mm)

(SKU: 30-130-23)

$15.00

© 2025 Teknik Motorsport Pty Ltd. ABN: 29137380324. All rights reserved.

Welcome to our website. If you continue to browse and use this website, you are agreeing to comply with and be bound by the following terms and conditions of use, which together with our privacy policy govern Teknik Motorsport Pty Ltd’s relationship with you in relation to this website. If you disagree with any part of these terms and conditions, please do not use our website.

The term ‘Teknik Motorsport Pty Ltd’ or ‘us’ or ‘we’ refers to the owner of the website whose registered office is 4/5 Harford St, JAMISONTOWN, NSW, 2750, AUSTRALIA. Our ABN is 29137380324. The term ‘you’ refers to the user or viewer of our website.

The use of this website is subject to the following terms of use:

The content of the pages of this website is for your general information and use only. It is subject to change without notice.
Neither we nor any third parties provide any warranty or guarantee as to the accuracy, timeliness, performance, completeness or suitability of the information and materials found or offered on this website for any particular purpose. You acknowledge that such information and materials may contain inaccuracies or errors and we expressly exclude liability for any such inaccuracies or errors to the fullest extent permitted by law.
Your use of any information or materials on this website is entirely at your own risk, for which we shall not be liable. It shall be your own responsibility to ensure that any products, services or information available through this website meet your specific requirements.
This website contains material which is owned by or licensed to us. This material includes, but is not limited to, the design, layout, look, appearance and graphics. Reproduction is prohibited other than in accordance with the copyright notice, which forms part of these terms and conditions.
All trademarks reproduced in this website, which are not the property of, or licensed to the operator, are acknowledged on the website.
Unauthorised use of this website may give rise to a claim for damages and/or be a criminal offence.
From time to time, this website may also include links to other websites. These links are provided for your convenience to provide further information. They do not signify that we endorse the website(s). We have no responsibility for the content of the linked website(s).
Your use of this website and any dispute arising out of such use of the website is subject to the laws of Australia.

This privacy policy sets out how we use and protect any information that you give us when you use this website.

We are committed to ensuring that your privacy is protected. Should we ask you to provide certain information by which you can be identified when using this website, then you can be assured that it will only be used in accordance with this privacy statement.

1. WHAT WE COLLECT

We may collect the following information:

name and job title
contact information including email address
demographic information such as postcode, preferences and interests
other information relevant to customer surveys and/or offers

2. WHAT WE DO WITH THE INFORMATION WE GATHER

We require this information to understand your needs and provide you with a better service, and in particular for the following reasons:

Internal record keeping.
We may use the information to improve our products and services.
We may periodically send promotional emails about new products, special offers or other information which we think you may find interesting using the email address which you have provided.

3. SECURITY

We are committed to ensuring that your information is secure. In order to prevent unauthorised access or disclosure, we have put in place suitable physical, electronic and managerial procedures to safeguard and secure the information we collect online.

We take all reasonable steps to keep secure any information which we hold about you.
Personal information may be stored both electronically on our computer system, and in hard-copy form.
Firewalls, 2048 Bit v3 SSL encryption, passwords, anti-virus software and email filters act to protect all our electronic information.
We do not store credit card information, we securely submit credit card information to our bank for processing.
We will not sell, distribute, lease or disclose your personal information to third parties (unless we are required by law to do so).
We may use your personal information to occasionally send you promotional information about our products and services which we think you may find interesting.
Should you wish to have your personal information removed or updated, or you would like to stop receiving advertising please CONTACT US.

4. HOW WE USE COOKIES

A cookie is a small file which asks permission to be placed on your computer's hard drive. Once you agree, the file is added and the cookie helps analyse web traffic or lets you know when you visit a particular site. Cookies allow web applications to respond to you as an individual. The web application can tailor its operations to your needs, likes and dislikes by gathering and remembering information about your preferences.

We use traffic log cookies to identify which pages are being used. This helps us analyse data about webpage traffic and improve our website in order to tailor it to customer needs. We only use this information for statistical analysis purposes and then the data is removed from the system.
Overall, cookies help us provide you with a better website by enabling us to monitor which pages you find useful and which you do not. A cookie in no way gives us access to your computer or any information about you, other than the data you choose to share with us.
You can choose to accept or decline cookies. Most web browsers automatically accept cookies, but you can usually modify your browser setting to decline cookies if you prefer. This may prevent you from taking full advantage of the website.

LINKS TO OTHER WEBSITES Our website may contain links to other websites of interest. However, once you have used these links to leave our site, you should note that we do not have any control over that other website. Therefore, we cannot be responsible for the protection and privacy of any information which you provide whilst visiting such sites and such sites are not governed by this privacy statement. You should exercise caution and look at the privacy statement applicable to the website in question.

5. CONTROLLING YOUR PERSONAL INFORMATION

You may choose to restrict the collection or use of your personal information in the following ways:

whenever you are asked to fill in a form on the website, look for the box that you can click to indicate that you do not want the information to be used by anybody for direct marketing purposes
if you have previously agreed to us using your personal information for direct marketing purposes, you may change your mind at any time by CONTACTING US.