Boyesen RAD Valve

Patented, one-piece, cast aluminum reed block system that delivers guaranteed bolt on performance. Carb boot, carb boot clamp and gasket provided. No modifications required, everything you need is in one box.

Boyesen's hot RAD valve provides plenty of offroad torque
Custom reed cage holds Boyesen's carbon fiber reeds
Sustains flow velocity through the valve and redirects intake charge for balanced distribution to intake ports
Quickens throttle response and ramps up horsepower throughout RPM range
Solid one-piece aluminum casting
Simple installation
Sold individually
Made in the USA

Specification	Details
Carburetor Type	Varies (make selection above)
Country of Origin	USA
Material	Varies (make selection above)
Quantity	Varies (make selection above)

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

ATC250R 1985-1986
CR125R 1988-1997, 2000-2007
CR250R 2-Stroke 1986-2007
CR500R 1990-2001
TRX250R FourTrax 250R 2x4 1986-1989

TE 250 2012-2014
TE 300 2012-2014

CR125 1995-1997
TC 125 2014-2015, 2017-2022
TC 250 2014-2016
TC 85 2014-2017
TE 125 2014-2016
TE 250 2014-2016
TE 300 2014-2016
TX 300 2017-2019

125 EGS 1998-1999
125 EXC 1998-2005, 2015
125 SX 1998-2015, 2017-2019
144 SX 2007-2008
150 SX 2009-2015
150 XC 2010-2014
150 XC-W 2017-2019
200 EXC 1998-2005
200 SX 2003-2005
200 XC 2006
250 EXC 1998-2003
250 MXC 1998-2001
250 SX 1998-2001, 2004-2016
250 XC 2007-2016
300 DXC 1990-1992
300 EGS 1995-1999
300 EXC 1990-2003, 2015, 2017
300 MX 1990-1991
300 MXC 1994-2003
300 XC 2007-2016
350 EXC 1988-1990
350 MXC 1987
380 EXC 1998-2002
380 MXC 1998-2001
380 SX 1998-2002
440 EXC 1994-1995
440 MXC 1994-1995
500 MXC 1995
550 MXC 1994-1995
65 SX 1998-2019
85 SX 2009-2017

KDX200 1989-2006
KDX220R 1997-2005
KX100 1995-1997, 2001-2009, 2011-2019
KX125 1992-2005
KX250 2-Stroke 1987-2007
KX500 1987-2004
KX65 2000-2019
KX80 1991-1997
KX80 Big Wheel 1991-1994
KX85 2001-2019

Sport 400L 1994-1998
Trail Boss 350L 2x4 1990-1993
Trail Boss 350L 4x4 1990-1992

LT250R QuadRacer 250 1988-1992
RM100 2003
RM125 1992-2008
RM250 1990-2008
RM65 2003-2005
RM80 1994-2001
RM85 2002-2010, 2012, 2015-2019
RM85L 2002-2010, 2012
RMX250 1996-1998

WR250Z 1992-1997
YFS200 Blaster 1988-2006
YFZ350 Banshee 1987-2006
YZ125 1989-1993, 1995-2021
YZ250 2-Stroke 1989-2021
YZ250X 2-Stroke 2016-2022
YZ80 1994-2001
YZ85 2002-2018

Customer Reviews

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Easy install and you can instantly tell the difference. Hands down great product. I wish cost was lower, hey you gotta pay to play.

Boyesen makes great products.

Awesome power adder! Great store

Exactly as described!

Excellent product.

Boysen rad valve works to keep throttle more snappy and improved performance on bike. One piece design for easy install. Comes with instructions on how to properly jet. I would recommend and use this product again.

Amazing build quality and definitely is adding some throttle response and low end. My bike comes on sooner and harder with this, without giving up anything up top.

As I expected it added a bit more throttle response, nothing crazy but it comes on earlier and harder. I really wanted it for the build quality and only needing one gasket vs the stock reed setup. Definitely overpriced but a great product.

Parts are awesome.

The Rad Valve lives up to what it says. Personally, I'd be careful though and wouldn't try much leaner on the mains like Boyesen instructs. I jumped a few richer & could even go up more.

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Questions & Answers

Ask Question

Will this rad valve fit a 93 YZ250

By Jski

Yes, there is a RAD valve offered for that 1993 Yamaha YZ250. Just be sure to select that year/make/model before adding to your cart.

By Andy

Answer Question

Does this come with reeds as well

By Anon.

Yes, the reeds are included with the RAD Valve.

By Andy

Answer Question

Will this fit a 89 yz 125

By Anon.

Yes, you can choose that 1989 Yamaha YZ125 when adding to your cart for this RAD valve to make sure you get the correct part.

By Andy

Answer Question

does this fit 1999 yz250

By Anon.

Yes, that is one of the models you can choose from the drop down for this RAD Valve.

By Andy

Answer Question

Does this fit a 2000 suzuki rm 125

By Anon.

Yes, if you were to select the 2000 Suzuki RM125 RAD valve from our fit guide, you'd have no problem fitting this unit to your machine.

By Staff

Answer Question

When purchasing for a banshee, is the price for a pair?

By Mike

Does price include both sides

Yes, you would receive two RAD valves with your purchase if you were to order this kit for a Banshee.

By Staff

Answer Question

Does this come with reeds or do I have to buy reeds separate?

By Dalton M

Yes, the reeds are indeed included with each Boyesen Rad valve. You need not purchase those separately. Everything you need to fit this to any machine you see in out fit guide is included in the box.

By Staff

Answer Question

What the intake size for the carb side? For a 2006 Yamaha blaster

By Anon.

Boyesen Rad valves are designed to fit the OEM carburetor. That is to say, the intake size as the same size as the OEM unit on your Yamaha Blaster.

By Staff

Answer Question

is the intake boot included on the kx 500 rad valve?

By G

Yes, the intake boot is included with every Boyesen Rad Valve kit. You also get the boot clamp and gasket to go with it. It'll bolt straight to the OEM carburetor of any machine we have listed in our fit guide without issue, guaranteed!

By Staff

Answer Question

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Boyesen RAD Valve

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