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Boyesen Rad Valve

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Boyesen Rad Valve

Product Description

  • One piece design.
  • Easy installation.
  • The intake charge is redirected for more even distribution of the intake ports.
  • Constant flow velocity is maintained for instant throttle response and more horsepower.
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MURRAY312 Location: Athens Tn.
1-2 of 2
Ease of Installation
Verified Purchaser
Location: San Luis Obispo , CA

I decided to try out the Rad Valve on my Rm 125 and am very satisfied. Being very sensitive to Jetting I had some concerns. It seems like the consensus is that the Rad Valve requires more jetting changes then the V force but is potentially a better mod. I believe this is true. Although I noticed an increase in performance right away. It became more noticeable when I leaned the main out a little more. The Rad Valve improved performance all over the Rpm range. Will it make you faster? Probably not. Is it worth the money? That depends on how much money you make and if you know how jet your bike. (MXA's secret jetting specs is a good place to start.) Or the FMF website!! =) Will I Install a Rad Valve on every 2 stroke I own from now on. Yes!!

Ease of Installation
Top 500 Contributor
Location: Athens Tn.
Proven quality.

Excellent performance as always.

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Total Questions (4)
Questions with answers:
Questions without answers:
Nottoooldyet Location: Longview, Texas
1-4 of 4
babytrev 1 month 12 days ago
Boyesen rad valve VS. v force?
I want to add a little hp to my bike but im not sure which one to pick boyesen or v force some one help me decide.
ryan Over 9 months ago Location: Ohio
What do I order for replacement reeds? I have the rad block already?
My reeds are worn out and one is broken. I don't see replacements for the rad reeds.
MotoSport Staff
Over 9 months ago Location: Portland, OR, USA
The Rad Valve takes specific reeds from Boyeseen. If you can give us a call, we can get you taken care of with pricing and availability of the correct reeds for your 1994 YZ125.
Nottoooldyet Over 10 months ago Location: Longview, Texas
Boyesen vs V Force?
Why do the parts look so much different? The V Force is a cage that slips into the existing port on the intake and the Boyesen looks like it's an add on to the engine?
MotoSport Staff
Over 10 months ago Location: Portland, OR, USA
They really are both trying to accomplish the same thing. Realistically they they are pretty much the same except Boyesen integrates the intake manifold into their reed block instead of using the stock one. Both are trying to create a less turbulent and effective intaker charge into the engine, and they both do accomplish this. Typically the Boyesen valves are known to produce a little more bottom end, and the V Force's rev a little more freely. Personally on my 125's, i have always ran the V force's.
Agustin 1 year ago Location: Argentina
Do you have the reeds for this part??
It is for a suzuki rm 125 1998 with this boyesen kit.
MotoSport Staff
1 year ago Location: Portland, OR, USA
We can get you the replacment Boyesen Rad Valve reeds for your 1998 RM125. Unfortunately we do not stock them and will have to order them in for you. Please give us a call at your convenience and we can get you taken care of for this item.
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