Boyesen RAD Valve

Boyesen RAD Valve

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$143.99 - $245.99 MSRP $159.95 - $272.95

Rating 4.75 of 5 (10 Reviews)
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Product Information

Boyesen RAD Valve
  • Boyesen RAD valve developed with Factory Yamaha, Pro Circuit, Factory Kawasaki of Europe, Factory KTM and top pros like Jeremy McGrath, Sebastien Tortelli and many others
  • Specially designed reed cage now comes with Carbon Fiber Pro Series reeds
  • Maintains flow velocity through the valve and redirects intake charge for even distribution to intake ports for instant throttle response and more horsepower
  • Pull a gear higher on uphills; instant acceleration makes passing effortless
  • Made of one-piece aluminum casting and bolts in easily; no modifications necessary
  • Available in (Stock) for stock Banshee engines, and (Modified) for heavily modified banshee engines

**Notes: Sold in pairs for Yamaha Banshee 350.

**Closeouts are limited to stock on hand**

  • Item # 8129

FitmentView All

Honda Models

  • ATC250R: 1986
  • CR125R: 2001 - 2007
  • CR250R: 2000 - 2001, 2003 - 2004
  • CR500R: 1990 - 2001
  • TRX250R: 1986 - 1989

Kawasaki Models

  • KDX200: 1989 - 2006
  • KDX220: 1997 - 2005
  • KX100: 2001 - 2009, 2011 - 2013
  • KX125: 2001
  • KX250: 2000 - 2003, 2005 - 2007
  • KX500: 1987 - 2004
  • KX65: 2000 - 2009, 2011 - 2014
  • KX85: 2001 - 2014

KTM Models

  • 125 EXC: 1998 - 2001
  • 125 SX: 1998 - 2007
  • 200 EXC: 1998 - 2005
  • 250 EXC: 1998 - 2001
  • 250 MXC: 1998 - 2001
  • 250 SX: 1998 - 2001
  • 300 EXC: 1998 - 2001
  • 380 EXC: 1998 - 2002
  • 380 MXC: 1998 - 2001
  • 380 SX: 1998 - 2002
  • 65 SX: 1999 - 2009, 2011

Suzuki Models

  • QuadRacer 250R: 1988 - 1992
  • RM100: 2003 - 2004
  • RM125: 2000 - 2007
  • RM250: 2001, 2004 - 2008
  • RM80: 1994 - 2001

Yamaha Models

  • Banshee 350: 1987 - 2006
  • Blaster 200: 1988 - 2006
  • YZ125: 1993, 2004
  • YZ250: 1989 - 1994, 2000 - 2014
  • YZ80: 1993 - 2000

Product Reviews Showing All 10 Reviews

Overall Rating: 4.75 of 5

(10 Reviews)
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What Other Riders Are Saying...

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rad valve

This valve is amazing especially for the 2 stroke. I can't tell you how much power it added. I can tell you one thing though if my rad valve ever goes out again I will definitely get this kind plus motorcycle superstore is very helpful and have pretty good prices

cody - October 08, 2009

(hiville, CO)

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Worth every penny.

If you have a CR250R (or probably any 2 stroke these are designed for) you NEED this. I read for weaks about the case reed Honda CR250R motor, and many people agreed that the Rad Valve was a great solution for improving the bottom end response of the CR. They were right. I installed this with the Boyesen exhaust flange (I wish Motorcycle Superstore carried that as well) and the bike is amazing.

Jeff - June 01, 2010

(Merlin, OR)

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RAD Valve - 2005 YZ 250

This is the best aftermarket modification I have ever made. The power has increased immensely at all RPM ranges and is much more responsive (extremely snappy). I never expected it to make such a big difference and am still amazed. Highly recommended. Like some other reviews I have read, the power is almost "a bit much" for the woods...but that’s exactly the way I like it.

Zach - September 01, 2010

(Seattle, WA)

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Best $$ Spent

Huge throttle response improvement. Leans the mixtures out, but comes with carb tuning suggestions. No 2-stroke should be ridden without one. 2nd bike that I've bought this for and if I get another 2 stroke, I would buy it again.

jason - November 29, 2011

(St George, UT)

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Rad Valve SX 65

This is the best aftermarket purchase for a two stroke. throttle response is insane, real snappy. If you have a two stroke you these rad valves...

Brad - June 27, 2012

(Bancroft, IA)

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rad valve

Installed on my yz 85 lsr engine no problems. I like the design, and the quality and fit are outstanding.

dick - February 14, 2013

(soulsbyville, CA)

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Rad to the bone !!

The Rad Valve lives up to what it claims. Careful though, I wouldn't try going leaner on the main like Boyesen says. I jumped 2 full richer & could even go more !

scott kelly - December 09, 2008

(rock springs, WY)

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Boyeson RAD Valve, KDX200

Perfect fit and finish, includes new intake boot, noticeable increase in power throughout range, need to lean pilot and main one step down.

Mike - May 03, 2011

(Austin, TX)

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Needed to be modified to fit my 2001 KX 125

The Boyesen Rad Valve is a great product, but the site needs to inform you that it needs to be milled down a few centimeters almost to the letter "B" on the Boyesen sticker. Otherwise it hits your cable clutch release when you pull the clutch ever and you get no movement. So just tell people this and you would be fine.

Josh - January 30, 2012

(Painted Post, NY)

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Nice enhancement.

The fit was a little off, so had to use the grinder/buffing wheel to shave just a little of the housing so it would fit, after that it was perfect. Did not need to re-jet. It gave the bike more bottom end torque and quicker throttle response. Very pleased with this upgrade.

Shawn - December 14, 2010

(Mountain View, WY)

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