Bike Setup Yamaha YZ450F/YZ250F 2018-2023

Make:  Yamaha

Model: YZ450F YZ250F

Relevant Years: 2018-2022 YZ450F 2019-2022 YZ250F

Oem Trim / Test notes:  Overall a very good bike in oem trim with many riders able to moto on loamy smooth tracks and big jumps without too much issue.  Under race conditions and on rough, choppy tracks we have found the oem setting to be too firm especially on initial action and under hand feeling through the grips.  It’s a simple setting / valving change required to transform these blue bikes to have a plusher feeling while still retaining great holdup.  Tested Settings are available across the board from ABC -VET level thru to A professional motocross.    



Base Setup – Disassemble clean and inspect suspension units.  Modify Valving specs to Krooztune tested data.  Install service parts required and rebuild suspension units to specification.

Fork only $450

Shock only $350  

Fork and Shock $800

Lowering Options Available, call for information



If rider weight is outside of oem spring rate range, heavier or lighter fork and shock springs may be required.

Fork $219.95

Shock $219.95

*Service wear parts and performance upgrade parts not included   


Additional Service Options

Chassis service / regrease pivot points.  Head stem, Linkage, swingarm. Labour and grease $150

*Wear parts not included


Optional Krooz Racing Performance parts:


Highspeed Compression piston – High flow Alloy piston to reduce highspeed shaft induced compression spikes.

Performance Linkage- Allows rear end hold down and a flatter bike into the turns without the need to reduce shock spring preload.   Retaining excellent drive out of the turns and reducing sudden weight transfer under heavy braking scenarios.


Mid Valve Post Assembly – The oem mid valve compression and rebound post we have tested to be best suited for pro and high A level riders only.  Our Krooz Racing Midvalve post assembly allows a much plusher feeling in hand and a smoother overall suspension action better suited to most Aus MX applications and harsh conditions.

Common Service parts

SKF Heavy Duty Forkseals $100

Shock Sealhead rebuild kit $50

Fork Bushes x2 $40 (most common) or x4 bushes in kit $80


Further Performance Suspension Upgrade Options

Xtrig Preload adjuster $280

DLC Black fork tubes $450 each (2 required)

Kashima Upper tubes $550 each (2 required)


Technical Touch Factory Kit Option

Fork  $5500

Shock $3700

Xtrig Clamps $1150 including PHDS bar mounts


Steering Damper

Precision Steering Damper available $1100