PROX VALVE AND SPRING INTAKE KIT

§ 01 / Part

09261033 VALVE AND SPRING INTAKE KIT

Fits Kawasaki KX 450 F
RRP £147.66 Save 20%
£118.13

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09261033

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PROX

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§ 02 / About this part

What it is

The PROX VALVE AND SPRING INTAKE KIT, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

This kit replaces the intake components in your cylinder head during a top-end rebuild. High-velocity air and fuel wash eventually wear the valve faces, leading to hard starting and loss of power. This kit includes steel valves and matched heavy-duty springs to restore factory performance. Steel conversions provide a longer service life for riders prioritising durability over marginal weight savings. Ensure your valve seats are checked for a perfect seal before installation. Always fit new stem seals when rebuilding the head to prevent oil leaking into the combustion chamber.

§ 03 / Specs

The numbers

Brand
PROX
Part number
09261033
Weight
0.16 kg
VAT
20%

// Fitment

Will it fit your bike?

Fits 1 model · 1 year-band

* Fitment data is provided as a guide. Verify compatibility against the bike's owner's manual or service handbook before ordering. Iron Offroad accepts no liability for incorrect application. Full terms and conditions apply.

§ 05 / About Iron Offroad

Iron Offroad

Iron Offroad is the off-road sibling of Iron City and Iron Stable — a UK shop for motocross, enduro, and trail-bike hard parts. Every fitment lives on the site, listed against KTM, Husqvarna, GasGas, Yamaha, Honda, Kawasaki, Suzuki, and Beta. Pick your bike on the timing-tower. Our USP is the data: fully enriched fitment so you find the right part for your bike quickly and get it fitted accurately. Brands you'd find on a paddock workbench — pads, sprockets, plastics, fork seals, cables, gaskets, bars, the things that actually wear out. Road-bike kit, scooter parts, and quad gear sit elsewhere; dirt and e-moto only. We operate from our storage facility in Leeds. Iron Offroad is a trading name of Iron Stable Ltd, registered in Mildenhall — Company No. 17061294. The business has a rich motorcycle history across multiple moto brands — the photos show where we came from — and recently pivoted into hard parts and online retail.
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Free UK shipping over £100 14-day no-quibble returns OEM-grade parts only UK support · Tue–Fri 9–5, Sat 9–4 Race-shop prices, paddock service Collection from Leeds by arrangement
Free UK shipping over £100 14-day no-quibble returns OEM-grade parts only UK support · Tue–Fri 9–5, Sat 9–4 Race-shop prices, paddock service Collection from Leeds by arrangement