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Krooztune

Supercross Spring Seat KYB 48mm / Showa 49mm

$309.95
Tax included. Shipping calculated at checkout.

Increased bottoming resistance and more ramp up mid stroke to handle big hits and heavy landings.  Designed to work with supercross suspension builds but also a simple mod to add to any arena x setting adding confidence over the bigger jumps.  

Fits KYB 48mm forks (29mmCartridge tube) on all modern Motocross bikes:

Yamaha YZ450F 2018-

Yamaha YZ250F 2019-

KX250F 2021-

 

Fits Showa 49mm forks fitted in :

Honda CRF450 2017-

Honda CRF250 2018-

Kawasaki KX450 2019-

Suzuki RMZ450 2018 -

 

 

 
SX SPRING SEAT: KYB 48mm
SX SPRING SEAT: KYB 48mm

Product information

PRODUCT FEATURES

Australian Manufactured

Designed, tested and produced in Australia to meet the demands of real riders and harsh local conditions. Quality you can trust, built by riders who care.

CNC Machined Precision

Every component is machined in-house on high-accuracy CNC equipment, ensuring perfect tolerances, consistent performance and a premium finish.

High-Grade Alloys (AUS & NZ Sourced)

We use only premium billet alloys sourced from trusted suppliers in Australia and New Zealand, delivering superior strength, durability and long-term performance.

Engineered for Reliability

Each part is rigorously tested on track and in the workshop to ensure dependable performance under load, in all conditions — from weekend riding to pro-level racing.

Get Your Perfect Setup

Not sure which setting, kit level or upgrade is right for your bike?

We’ll match your suspension to your weight, speed and riding style using real data and years of race-proven experience.

Submit your details and we’ll guide you to the ideal setup.

Setup Here

F.A.Q.

They appreciate cut and details, things that aren't so obvious.

Do you offer setup advice with this product?


Absolutely.

Every purchase includes access to our Setup Form, where we provide personalised guidance on your ideal settings, spring rates, and upgrade choices.
Can I purchase items with another currency?

Yes, you may select a currency based on your personal preference. When you select your country in the country selector and set to your country’s version of the website, you will see prices listed in the regional currency.
Can I make changes to my order after it’s been placed?

Email Info@krooztune.com asap and quote your order number. Our emails are checked daily before shipping out any orders
What if I have issues or need support after buying?

We’re here to help.

You can reach us anytime for setup adjustments, technical questions or installation support. Krooztune products are backed by real riders and real workshop support.
Do I need to pay extra tariffs or taxes when ordering from the USA?

No — Krooztune covers all USA tariffs and import taxes.

The price you see at checkout is final, with no hidden fees or surprise charges upon delivery.

USA Customers: No Extra Duties — We Cover Everything
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USA Customers: No Extra Duties — We Cover Everything
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Precision-built parts designed, tested and machined in Australia.

Engineered for Performance

From billet alloys to fully tested suspension internals, every Krooztune component is created with one purpose — to deliver better control, improved feel and a more confident ride.


Built by riders, proven on track, and trusted worldwide.