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Boyesen Rad Valve

5.0 (2 reviews)

Regular: $159.95 - $272.95 Save 10%!
Sale: $143.95 - $245.95

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Product Details


  • An aero-form reed valve that corrects the problems associated with existing reed valve designs
  • Maintains flow velocity through the valve and re-directs the intake charge for even distribution to the intake ports
  • Provides quicker, sharper throttle response and more horse power
  • 1-piece aluminum casting; no manifolds to trim or plastic pieces to insert
  • Sample image shown, product will vary by make and model

Specifications and Options

Brand Boyesen
Design Modified Carbs, Stock Carbs

Q & A

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Browse 5 questions Browse 5 questions and 5 answers
I have a 2001 kx500, is this bolt on and go or will I need to re-jet the carb? The motor is all stock with stock carb.
kingfisher on Sep 28, 2011
BEST ANSWER: Thanks for your question! This will bolt right on. Some Jetting may be required due to the elevation or climate you may be at.
will this fit on my 1995 polaris scrambler 400 4x4 #w957840 also what will engine performance be, does jetting need to be changed or ??? any suggestions will greatly be appreciated to get my wheels rolling again, thanks Tim
null on Jan 28, 2011
BEST ANSWER: Thanks for your question! This reed cage will give you much better throttle response, And crisper power through the whole rpm range. You can use the stock jetting
will this fit a 1995 polaris 4x4 scrambler 400. oem is no longer availible it seems. can you help. thanks
null on Jan 25, 2011
BEST ANSWER: Thanks for your question!

Yes this will work on your machine, Please view the link given below to purchase.

Will this set up fit on the 2000 ktm 380 EXC and does it come with reeds? Thanks
bobkatoom on Nov 28, 2009
BEST ANSWER: Thanks for your question! BikeBandit.com is constantly working to expand its aftermarket parts selection. The item you are looking for is not offered by BikeBandit.com at this time. We will forward your email to a product manager so that they may consider including that item in our product offering. Please visit us often to view our new products.
hey will the boysen radvalve fit aftermarket 34mm keihin carb

radvalve for 1995 yamaha blaster
motoarch on Oct 6, 2009
BEST ANSWER: Thanks for your question! This unit still will work no problem with the carb your running on your machine.


5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Would you recommend
Yes (2)
Would you recommend
I bought it because my rubber intake was cracked and I'm very pleased with the amount of power that this intake provide. Jet it right and you a completly different bike.
June 15, 2018
over 2 years ago
Would you recommend
awesome product
it is really amazing quality and workmanship!
It worked first time out of the box with just a little adjustment. We had to do a slight trimming of forward edge where it goes into the intake due to running non-standard honda cylinder (Athena cylinder is different), but other than that it was perfect! Could not be happier!!! Great power and performance over stocker.
March 25, 2014
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