Boyseen Rad Valve - Remove Intake Manifold

[havinnoj]

Thoughts on hacking the integrated intake tube off the Boyseen Rad Valve so you could run a UPP (or similar) intake?  Main reason to do this is to help with fitment and easier reinstallation.

[05450r]

Or just run Cr intake with Boyseen reeds

[havinnoj]

Or just run Cr intake with Boyseen reeds

Sure there's lots of other ways to get around this.  The question is specific to whether anyone has cut off the molded section since I have a rad valve that preforms nicely on this motor.

[05450r]

Once you cut that off and open in up your changing the originally designed airflow of the Boysen to the intake airflow of the Upp. Dont get me wrong, Ive used several Rad Valves, and I like the design for easy bolt on and go, but Ive had better luck with Cr250. Use a Upp with that cage and get a nice setup, of course the V-force guys will always prefer that cage. Not trying to de-rail or argue the subject, Imo it will have a negative impact on its originally designed airflow

[havinnoj]

Yeah it very well could have a negative impact.. or it may be negligible - does [MENTION=276]ledperformance[/MENTION] has some thoughts on the topic.

[ledperformance]

Yeah it very well could have a negative impact.. or it may be negligible - does [MENTION=276]ledperformance[/MENTION] has some thoughts on the topic.

The V-Force reed valve is a clear choice.
The Rad 02 B works well with triple stage reeds. Boyesen did extensive research on air flow the best trade off between air flow and velocity. It would be hard to keep that relationship intact if you cut off the valve and adapted the UPP boot.
Also the shape of the rad valve encourages air to flow the full width of the valve, even though the air comes in at an angle. We were working with Boyeson in those days and they had some innovative ways improving reed valve designs. The designs how ever are now 12 years old and v-force is current technology. Technology marches on, why not take advantage of it?

[havinnoj]

The V-Force reed valve is a clear choice.
The Rad 02 B works well with triple stage reeds. Boyesen did extensive research on air flow the best trade off between air flow and velocity. It would be hard to keep that relationship intact if you cut off the valve and adapted the UPP boot.
Also the shape of the rad valve encourages air to flow the full width of the valve, even though the air comes in at an angle. We were working with Boyeson in those days and they had some innovative ways improving reed valve designs. The designs how ever are now 12 years old and v-force is current technology. Technology marches on, why not take advantage of it?

Thanks for the insight Arlan.  I was planning to use them for a single riding season but looks like I should move to the V-Force.  Do you recommend the current V-Force-3 over the original Delta and VF-2?

[havinnoj]

[MENTION=87]havinnoj[/MENTION] you can hold the boyesen for me lol!

Sounds good Jon.. it's yours come May/June!

[ledperformance]

Use the Latest valve available.

[85drag250r]

The V-Force reed valve is a clear choice.
The Rad 02 B works well with triple stage reeds. Boyesen did extensive research on air flow the best trade off between air flow and velocity. It would be hard to keep that relationship intact if you cut off the valve and adapted the UPP boot.
Also the shape of the rad valve encourages air to flow the full width of the valve, even though the air comes in at an angle. We were working with Boyeson in those days and they had some innovative ways improving reed valve designs. The designs how ever are now 12 years old and v-force is current technology. Technology marches on, why not take advantage of it?

I am using the 02 B version of the rad valve, but I ported mine. I opened the mouth of it to 42mm. As I ported it further in, I tried to keep the inside the basic shape that it started out as. I removed the horizontal divider but kept the vertical one to help direct the flow a little better.

[udontknowme]

i dont know if the 250r has the same problem but the radvalve for the 500 is longer in the frontal section than the vforce and stock cage. it puts the petals basically right on the piston and i dont like that plus it really clogs up the boost port and i dont like that either. been using v3 on the 500 and it seems to work good. definatly i like it better than the radvalve i was using before