V-force or Boyesen??

[kwmotocrosspunk]

get the vforce, youll have no problems, its awesome

[530Racer]

get the v-force i mean it has to be good if the factory teams use it but i also use and it is great

[Michael Parker]

Originally Posted by 530Racer

get the v-force i mean it has to be good if the factory teams use it but i also use and it is great

im going to second what he said. you will notice a great improvement with the vforce. i would recoment that before a pipe or silencer any day

[psyklone393]

this is only speaking from experience, so take that for whatever it's worth ...

i don't have the v3 (yet!) but i do have v2 on my '99 yz125. there was no cutting involved, so that wasn't an issue. the first thing that i noticed was how crisp the throttle response was off the bottom, and it continued to pull through the 'right-wrist-twist' range. for me, the biggest difference i noticed was the difference in the initial throttle response.

that being said, there have been complaints about the gasket that the vforce comes with causing intake air leaks. the common work around (and probably best advice to avoid any issues) is to use an rtv sealant along with or in place of the provided gasket.

good luck either way!

-Z

[kwmotocrosspunk]

all about the vf3, nothing better, and if you have to cut its really easy, we had to do it on my yz 80 but its simple

[AKColby]

I'd go with the Rad valve, especially if they didn't want to send you a Dyno sheet

[kwmotocrosspunk]

no no no go vf3

[Red Rider 943]

Boyesen.

[bikepilot]

I've not used a V-3, but I've always had good luck with RAD valves in the past. You might also look up replacement reed costs (and don't forget how many you'll need for each respective unit).

[moto814]

There is no one answer to this. It depends on the engine to some extent and the mechanical ability of the rider/mechanic also.

In most cases, if you know how to properly jet the carb, you will see better results from the Boyesen RadValve.

When you make changes to how the fuel/air mix flows through your engine, you will have to compensate with jetting. That being said, the VForce line of products will usually require little to no change in jetting - which inferrs that they make little to no difference in fuel/air flow through the engine. The RadValve requires substantial changes in jetting - which inferrs that it makes a substantial difference in how fuel/air flows through your engine.

In real-world conditions, I have tried the Vforce and RadValve back to back on the same bike numerous times on many different models. It is rare that the VForce will work better.

If I had to spend my money on one, it would be the RadValve.

-Steve

[AKColby]

Originally Posted by moto814

There is no one answer to this. It depends on the engine to some extent and the mechanical ability of the rider/mechanic also.

In most cases, if you know how to properly jet the carb, you will see better results from the Boyesen RadValve.

When you make changes to how the fuel/air mix flows through your engine, you will have to compensate with jetting. That being said, the VForce line of products will usually require little to no change in jetting - which inferrs that they make little to no difference in fuel/air flow through the engine. The RadValve requires substantial changes in jetting - which inferrs that it makes a substantial difference in how fuel/air flows through your engine.

In real-world conditions, I have tried the Vforce and RadValve back to back on the same bike numerous times on many different models. It is rare that the VForce will work better.

If I had to spend my money on one, it would be the RadValve.

-Steve

I'm in this same predicament and I think Steve has the best explanation so far, I've been a member of PT and he knows his stuff

[Red Rider 943]

Originally Posted by moto814

There is no one answer to this. It depends on the engine to some extent and the mechanical ability of the rider/mechanic also.

In most cases, if you know how to properly jet the carb, you will see better results from the Boyesen RadValve.

When you make changes to how the fuel/air mix flows through your engine, you will have to compensate with jetting. That being said, the VForce line of products will usually require little to no change in jetting - which inferrs that they make little to no difference in fuel/air flow through the engine. The RadValve requires substantial changes in jetting - which inferrs that it makes a substantial difference in how fuel/air flows through your engine.

In real-world conditions, I have tried the Vforce and RadValve back to back on the same bike numerous times on many different models. It is rare that the VForce will work better.

If I had to spend my money on one, it would be the RadValve.

-Steve

Good to see you posting here steve.

[AKColby]

BTW welcome to ATM

[moto814]

Thanks. A customer told me about this place, and I figured I'd check it out.

-Steve

[festerovic]

surely a noob question: When you people are talking about Boyseen/Vforce valves, are you talking about having the entire cage, or just the petals? Can I use just the higher performance petals in the stock cage? thanks

[moto814]

Originally Posted by festerovic

surely a noob question: When you people are talking about Boyseen/Vforce valves, are you talking about having the entire cage, or just the petals? Can I use just the higher performance petals in the stock cage? thanks

The Boyesen RadValve and MotoTassinari V-Force are both replacement reed blocks.

Boyesen makes hi-performance replacement reed petals for the stock blocks. Honestly, they are fine for most people. Strangely enough, in most cases they are as good as or better than the V-Force blocks.

-Steve

[Florida 393]

Steve,
Thank you for taking time to politely and professionally answer our member's questions. Welcome to AllThingsMoto from the staff. Stick around and post when you can. It is nice to get good information from someone that presents it so well.

Bill

[kwmotocrosspunk]

Originally Posted by moto814

The Boyesen RadValve and MotoTassinari V-Force are both replacement reed blocks.

Boyesen makes hi-performance replacement reed petals for the stock blocks. Honestly, they are fine for most people. Strangely enough, in most cases they are as good as or better than the V-Force blocks.

-Steve

im going to have to disagree, i personally prefer the VF3, but anyways WELCOME TO ATM STEVE!!

[wamxp1mp]

I've heard conflicting things about either but I had V3 on my '04 KX 125 and I know for a fact it made a difference cause the bike was totally stock and jetted well within the ball park. I got crisper throttle responce less bog off of harder landings cause of that and it pulled cleanly threw the entire rpm range where it actually gained alittle bit on the very top end. I'm gonna get another V3 for my '06 YZ 125 what I really like about it, is there are no screws holding it together! personally I think the V3 and boyesen are pretty damn equal in terms of performance.

[moto814]

Originally Posted by wamxp1mp

I had V3 on my '04 KX 125 and I know for a fact it made a difference cause the bike was totally stock and jetted well within the ball park. I got crisper throttle responce less bog off of harder landings cause of that and it pulled cleanly threw the entire rpm range where it actually gained alittle bit on the very top end.

I never said the V-Force wasn't a good product. What I said is that the Boyesen RadValve is better in most applications, and for most people, the standard Boyesen Power Reeds will work as well as, or better than a V-Force. The V-Force works better than stock in most cases, but usually not as good as the RadValve. Heck, there are some bikes where stock is best. Those are few and far between however.

A simple test. When you install a V-Force block in your bike, you will most likely not have to rejet. Meaning that the V-Force did not appreciably change the flow into the engine. Now, when you install either Boyesen Power Reeds, or a Boyesen RadValve, you will have to rejet (usually leaner) to get them to work properly. Why? Because they do change the flow into the engine.

-Steve