Maintenance & Technical > KX500 Original

Quick help with V-Force 3

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BDI:

--- Quote from: meangreen500 on March 29, 2010, 03:29:06 PM ---you have any comparison to each other some numbers maybe. I dont know my kx revs fast and has serious low grunt and has great responce overall, The cr is a little different it lost some bottom end but sure picked it up in the mid and top. also my kx has good over rev.   The rad valve is made of billet and the vforce is plastic. give some reasons that it is so much better you guys arent giving very much. Ive had it on for over 5 years now with no problems.

--- End quote ---
Do you understand how reeds work as far as stiff versus soft and why the reeds ability to respond to engine pulses is so important. Also I know stewart has dyno tested the s**t out of the different reeds. perhaps he could give you some numbers. by the way do you wan't to get rid of your rad valve. I want one to cut up to make something out of.

kaw rider:
The over the shelf reed cages are at there limits for more power and torque.

Polar-Bus:
I've tried a few reed types over the years from original Boyeseen's back in the day to more recent Carbon Techs to V-Force (The V-Force's on a buddies bike, not mine ), and didn't notice any substantial difference other than slightly crisper throttle response in the mid. IMO reeds are just another wallet bait gimmick, but then again maybe on a mod engine and a dyno there is in fact more power to be extracted by tuning...

kwakman:
i know the rad valve was designed to correct flow due to having a kink in the inlet tract to fit the shock.(not an issue on 86)is the v force 3 to improve mid range throttle response, or top end? and will they fit an 86 cyl? I was just going to get boyesen pro reeds, any thoughts?
Thanx, K.

Hillclimb#42:
 Also I know stewart has dyno tested the s**t out of the different reeds. perhaps he could give you some numbers. [/quote]
 :-D Thats what I thought...  It's apparently about the reed petal tip area...

I used to have a Boysen. There is something to be said for the long life of the billet intake they have and would kinda be cool for Boysen to make that intake for the big 41-44mm carbs. The Boysen, I had, came with my purchase of the bike, so no way for me to know what stock ones are like. I read about Stewart testing all of the reeds. Testing with a dyno, not trying to guess at anything. His findings on the Vforce impressed him. He said "the "RAD" valve must stand for Release At Dumpster, because its the only safe place for it." That info kinda stuck with me. The man of few words had some good ones there. :lol: I did question the plastic construction, and if it would stand up to race gas. It does. Cutting the tabs off flush on a brand new intake boot was more sketchy than any of it. Hopefully the V3i will continue to be developed. The "i" stands for Intake. They have an intake kinda like the Boysen design. I think they are only available for new Yamahas and Suzukis.
  Vforce II's helped my bike's tuneability. When you change a carb setting, you can tell. 8 bikes in the shop, 8 sets of Vforce, v2 or v3, in them. They work well....

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