SAME AS RAD-12E, BOYESEN RAD VALVE 99 KX250, BLOCK RAD-12D
4.1 Trustpilot 99.9% positive on eBay
UK delivery £4.99, free over £60 2–4 business days
Boyesen RAD-12D RAD Valve with carbon fiber reeds for improved performance. Maintains flow velocity and redirects intake charge for even distribution to intake ports. Offers sharper, quicker throttle response, added torque for improved performance on hills, corners, and jumps, and increased horsepower in low, middle, and top-end ranges. Features a one-piece aluminum casting requiring no trimming or plastic inserts.
- SKU
- 05-R12D
- Brand
- Boyesen
- Availability
- Out of Stock
Fitments (1)
| Make | Model | Year |
|---|---|---|
| KAWASAKI | KX 250 | 1999 |
- General Product Group
- Carburettor & Intake
- General Product Type
- Reeds - Valve
- Variant Id
- 208746
FULL DESCRIPTION
Boyesen RAD Valve - RAD-12D
Experience a significant boost in your motorcycle's performance with the Boyesen RAD Valve. This advanced intake manifold system is engineered to optimize the flow of the intake charge, ensuring a more even distribution to the intake ports. The result is a sharper, quicker throttle response, increased torque for better performance on hills and through corners, and substantial horsepower gains across the low-, middle-, and top-end ranges. Constructed from a durable one-piece aluminum casting, the RAD Valve requires no trimming or plastic inserts for a clean and efficient installation.
Key Features:
- Optimizes intake charge flow for improved distribution to intake ports.
- Delivers sharper and quicker throttle response.
- Enhances torque for superior performance in demanding conditions.
- Increases horsepower across all RPM ranges, particularly the top-end.
- Durable one-piece aluminum casting construction.
- Designed for direct fitment without modifications.
- Now includes carbon fiber reeds for enhanced performance.
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.