I have searched around, but have found mixed info. Are the aftermarkets options better than factory powervalve/reed combo......i.e, worth the money.
Thanks in advance!
Zeb
Factory Power Valve/Reeds
Started by hellifIknow, Feb 22 2012 05:32 PM
7 replies to this topic
Posted 22 February 2012 - 05:32 PM
I have searched around, but have found mixed info. Are the aftermarkets options better than factory powervalve/reed combo......i.e, worth the money.
Thanks in advance!
Zeb
Posted 22 February 2012 - 08:23 PM
i got boyeson reeds to go onto my stock cage. only 44 bucks and supposedly stronger than stock and give more top end
Posted 23 February 2012 - 06:49 AM
Here's what MXA had to say:
Seems either the Vforce or the Boyeson Rad Valve are good upgrade options. I have neither, but when it's time to change, I'll probably end up with the Rad Valve as I had one before on my 99 yz250 and liked it a lot.
Quote
Q:MOTO TASSINARI OR BOYESEN RAD VALVE?
A:The MXA test riders have raced with both the Moto Tassinari VForce3 and the Boyesen RAD Valve, and the simple truth is that they both work. If you favor stronger midrange, you might go with the VForce, while the RAD Valve offers the ability to get a potent mid-and-up hit (if you remove the stock 5mm spacer plate). Both reed valves work so well that we have to assume that the stocker has some flaws.
A:The MXA test riders have raced with both the Moto Tassinari VForce3 and the Boyesen RAD Valve, and the simple truth is that they both work. If you favor stronger midrange, you might go with the VForce, while the RAD Valve offers the ability to get a potent mid-and-up hit (if you remove the stock 5mm spacer plate). Both reed valves work so well that we have to assume that the stocker has some flaws.
Seems either the Vforce or the Boyeson Rad Valve are good upgrade options. I have neither, but when it's time to change, I'll probably end up with the Rad Valve as I had one before on my 99 yz250 and liked it a lot.
Posted 23 February 2012 - 09:18 AM
j-bo, on 23 February 2012 - 06:49 AM, said:
Here's what MXA had to say:
Seems either the Vforce or the Boyeson Rad Valve are good upgrade options. I have neither, but when it's time to change, I'll probably end up with the Rad Valve as I had one before on my 99 yz250 and liked it a lot.
Seems either the Vforce or the Boyeson Rad Valve are good upgrade options. I have neither, but when it's time to change, I'll probably end up with the Rad Valve as I had one before on my 99 yz250 and liked it a lot.
I think the most important statement in MXA's review above is the last one "Both reed valves work so well that we have to assume that the stocker has some flaws."
What bikes were they testing on? I general, I am hesitant to believe in the benefits of bolt-on performance because in my opinion the manufacturer stands the most to gain by having the bike perform at its best. Why would they knowingly put lower performing parts on it?
Posted 23 February 2012 - 09:39 AM
That was the 2007 YZ250 bike test. Same was said for the 2009 YZ250... since nothing was changed...I'm assuming the same all the way up through the 2012's.
Posted 23 February 2012 - 10:04 AM
j-bo, on 23 February 2012 - 09:39 AM, said:
That was the 2007 YZ250 bike test. Same was said for the 2009 YZ250... since nothing was changed...I'm assuming the same all the way up through the 2012's.
Very likely it would apply all the wat to 2012. Why do you suppose Yamaha doesn't sell it that way from the factory? Cost?
Have you heard anything about the Vforce effectiveness on the 125?
Posted 23 February 2012 - 10:24 AM
rjpjnk, on 23 February 2012 - 10:04 AM, said:
Very likely it would apply all the wat to 2012. Why do you suppose Yamaha doesn't sell it that way from the factory? Cost?
Have you heard anything about the Vforce effectiveness on the 125?
Have you heard anything about the Vforce effectiveness on the 125?
Cost I'd assume.
My sons 2002 YZ125 has the Vforce and is a bit crisper and "seems" like a tad more power than stock as I compare it to my other sons (2003) YZ125. So I really don't know on the newer bikes.
