Boyesen Fibreglass Reed Petal 644R for Yamaha WR250 WR250Z 1991-97 YZ250 1990-96 YZ250WR 1990

Name: Boyesen Fibreglass Reed Petal 644R for Yamaha WR250 WR250Z 1991-97 YZ250 1990-96 YZ250WR 1990
Brand: BOYESEN
SKU: 644R
Price: 42.39 GBP
Availability: InStock

Fits 4 bikes

RRP £51.07 Save 17%

£42.39

incl. VAT

In stock — delivered in 6–10 working days

Dispatched in 2–3 working days · delivered in 6–10.

Part #: 644R

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§ 02 / About this part

What it is

Boyesen fibreglass reed petal to fit Yamaha WR250 (1991–1997); Yamaha WR250Z (1991–1997); Yamaha YZ250 (1990–1996); Yamaha YZ250WR (1990).

These petals sit inside your reed cage to regulate the intake charge. Over time, the tips chip or lose tension, causing hard starting and a boggy bottom end. Replacing worn petals restores throttle response and crispness across the rev range. These fibreglass versions provide a reliable seal against the cage. Always inspect your reed block for light gaps when fitting. This is a model-specific fitment designed to match the original intake tract dimensions. Keep your intake tract sealed to maintain peak primary compression.

§ 03 / Specs

The numbers

Brand: BOYESEN
Part number: 644R
Category: Top End
Weight: 0.04 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 4 models · 4 year-bands

Yamaha 4 models

* 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.