BOYESEN RAD VALVE 01-03 KX250, BLOCK RAD-12H, RAD12H
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 
18+, T&Cs apply
BOYESEN RAD VALVE 01-03 KX250, BLOCK RAD-12H, RAD12H. Now delivered with carbon fiber reeds for even greater performance gains. Maintains flow velocity through the valve and redirects intake charge for more even distribution to the intake ports. Sharper, quicker throttle response. Added torque improves performance on hills, through corners and over technical jumps. Increases horsepower in low-, middle- and especially the top-end ranges. One-piece aluminum casting, no trimming or plastic inserts required.
- SKU
- 05-R12H
- Brand
- Boyesen
- Availability
- In Stock (2)
Fitments (1)
| Make | Model | Year |
|---|---|---|
| KAWASAKI | KX 250 | 2003 |
- General Product Group
- Carburettor & Intake
- General Product Type
- Reeds - Valve
- Variant Id
- 208750
FULL DESCRIPTION
Boyesen Rad Valve with Carbon Fiber Reeds
Upgrade your motorcycle's intake system with the Boyesen Rad Valve. This high-performance reed valve is engineered to optimize airflow and combustion for significant performance improvements.
Key Features:
- Enhanced Performance: Now delivered with carbon fiber reeds for even greater performance gains.
- Improved Flow Dynamics: Maintains flow velocity through the valve and redirects the intake charge for more even distribution to the intake ports.
- Quicker Throttle Response: Experience a sharper and quicker throttle response.
- Increased Torque: Enjoy added torque, which improves performance on hills, through corners, and over technical jumps.
- Broader Powerband: Increases horsepower in low-, mid-, and especially the top-end ranges.
- Durable Construction: Features a one-piece aluminum casting, requiring no trimming or plastic inserts.
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.