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BOYESEN engineers embarked on a mission to create a new lineage of aerodynamic intake technology by refining the primary performance factors required to increase peak horsepower through design innovation: Aerodynamic Surface Optimization, Model-Specific Reed Petal Tensioning, Material Fuel Resistance, and Multi-Stage Reed Timing. Together, these innovations create a new technological benchmark in intake performance.
Boyesen engineers developed the RC2 Series Rad Valve to improve key intake performance factors through aerodynamic surface optimization, model-specific reed petal tensioning, material fuel resistance, and multi-stage reed timing. These design elements work together to support increased overall horsepower and improved throttle response.
Each Boyesen RAD Valve is tailored to the applicable model, year, and displacement. The intake charge is redirected for more even distribution to the intake ports, while constant flow velocity is maintained for responsive throttle operation and additional horsepower potential.
The Boyesen RAD-03A features a one-piece design for easy installation. It is designed for use with the Yamaha YZ250/250X, KTM 65SX, and Kawasaki KX85/100, as stated by Boyesen.
Features:
- Performance-focused intake design: Combines aerodynamic surface optimization, model-specific reed petal tensioning, material fuel resistance, and multi-stage reed timing.
- Model-specific construction: Each Boyesen RAD Valve is tailored to the applicable model, year, and displacement.
- Improved intake distribution: Redirects the intake charge for more even distribution to the intake ports.
- Consistent flow velocity: Maintains constant flow velocity to support throttle response and horsepower.
- One-piece design: Provides a straightforward installation design.
- Application: Designed for the Yamaha YZ250/250X, KTM 65SX, and Kawasaki KX85/100.
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RETURN POLICY 2026
ALL DISCOUNTED AND SALE ITEMS ARE A FINAL SALE !!!
We have a 14-day exchange policy on regular priced items only , ( discounted or sale items are not eligible for return ) , which means you have 14 days after receiving your item to request a exchange.
WE DO NOT REFUND we exchange only ...
PROCESSED ORDERS THAT ARE REQUESTING A CANCELLATION ARE SUBJECT TO A 20% RESTOCK FEE
To be eligible for a exchange, your item must be in the same condition that you received it, unopened or unused, with tags and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a exchange, you can contact us at usaspeedguys@gmail.com. Please note that exchanges will need to be sent to the following address and require an authorization first :
THE SPEED SHOP USA
ATT RETURNS
PO BOX 1254
PEACHLAND BC CANADA
V0H1X0
CANADA POST REGULAR SERVICE
If your exchange is accepted, we’ll send you a return authorization number, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any exchange question at usaspeedguys@gmail.com.
SHIPPING ON RETURNS IS AT YOUR EXPENSE WE DO NOT PAY FOR RETURN SHIPPING
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned LIKE custom order products (such as special orders or personalized items). We also do not accept returns for hazardous materials, flammable liquids, or gases. There is NO RETURNS on lighting or electrical components at all PERIOD . Please get in touch if you have questions or concerns about your specific item.
Unfortunately, WE DO NOT accept returns on sale items, DISCOUNTED ITEMS or gift cards.
Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.
WE DO NOT REFUND WE ONLY EXCHANGE
European Union 14 day cooling off period
Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days . As above, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
Exchanges
We will notify you once we’ve received and inspected your return and let you know if the exchange was approved or not. If approved, you will have 30 days to complete your exchange.
If more than 15 business days have passed since we’ve approved your return, please contact us at usaspeedguys@gmail.com
