RAD33 RAD VALVE CARBON FIBER

Name: BOYESEN RAD VALVE CARBON FIBER
Brand: BOYESEN
SKU: RAD33
Price: 202.94 GBP
Availability: InStock

Fits Yamaha YZ 125

£238.75 Save 15%

£202.94

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: RAD33

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§ 02 / About this part

What it is

The BOYESEN RAD VALVE CARBON FIBER, top end. Stocked by Iron Offroad, the UK MX hard parts specialist.

This reed valve system replaces the entire OEM intake block to improve airflow velocity. It sits directly between your carburettor and the cylinder. The carbon fiber petals react faster than standard versions to sharpen throttle response across the rev range. Over time, petals can chip or lose tension, leading to difficult starting and a muddy bottom-end. This is a model-specific fitment designed to optimise the intake tract of your 2-stroke engine. Always use fresh gaskets during installation to prevent air leaks. It is a vital upgrade for any top-end rebuild or performance tuning.

§ 03 / Specs

The numbers

Brand: BOYESEN
Part number: RAD33
Category: Top End
Weight: 0.44 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 1 model · 1 year-band

Yamaha YZ 125 1989–1992

* 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 — this is a UK shop for motocross, enduro, and trail-bike hard parts. All fitments live on the site, and listed against MX models KTM, Husqvarna, GasGas, Yamaha, Honda, Kawasaki, Suzuki, and Beta. Pick your bike on the timing-tower. Our USP is in the data, fully enriched to assist with accurate fitting and finding the right part for your bike quickly and easily. 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 & e-moto only. We operate from our huge storage facility in Leeds. Iron Offroad is a trading name of Iron Stable Ltd, registered in Mildenhall — Company No. 17061294. We have a RICH motorcycle history with multiple moto brands the images showing where we came from and our history, the business recently pivoted into hard parts and online retail.