KX Riders
Maintenance & Technical => KX500 Original => Topic started by: kawi4ever on March 29, 2010, 11:02:41 AM
-
Hi I just got my cylinder back from plating and my new V-Force 3 in, and when I install the V-force it is very snug in the cylinder, like the reed stops and too wide for the opening in the cylinder and when installed they actually are squeezed a little. Is this NORMAL with V-3 ? Please anybody that has installed these please let me know. Thanks ERIC :?
-
they do fit snug ..if there to tight sanding roll on a die grinder till some slight clearnce should do fine but rinse very good to remove grit
-
Thank you, i am going sand a little to give some space. Thank You :-D
-
Just got done sanding and grinding, what a joke just to get them snug and not super tight.. I hope this was worth it over the Rad Valve I already had in the engine before rebuild...
-
it s worth it
-
I got the rad valve on my kx and 2 cr500's. is the v force better or just what you have installed? just asking
-
rad valves suck. v-force is a major improvement in technoligy.
-
Brian
Your right the rad valve for the kx 500 is a great midrange cage with a 38mm carb. Back in the mid 90's when v-force was making there cages out of billet aluminum and good carbon base stock reeds, they were king. Know there plastic cages with poor carbon base stock.
The rad valve is a 250 design
-
Because the v-force has twice the reed peddal tip area it only has to move half as far as any other reed to flow the same amount. It has a super high Frequency response. I would say it has twice the frequency response of any other reed. that is what they were trying to accomplish with the dual stage reeds like the rad valve but what you get is a reed that is a compromise.
-
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.
-
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.
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.
-
The over the shelf reed cages are at there limits for more power and torque.
-
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...
-
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.
-
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....
-
here is a picture of the rad valve with the reed block machined off the area is very small
-
a stock cab measures about 40 mm at the intake side of its bore ..that is about 1.570 dia the rad valve when cut like this has around a 1.300 hole with a bridge in the center thats already removed from this one....these and the mossberger reed blocks are nice alumiun constrution but do not compare with the double tip area of the v force setup
-
:-D
Thank you Stewart for taking time out to post piccy's & all. I think sometimes it's hard to get the tone of a post when we spent more time in high school dreaming about cars and bikes & all and not really paying a whole lot of attention to english,grammer and the like. I (Like lot's of other Guys) do our best to get our point of view across without being antagonistic or judgemental. Some guys may be a little rough around the edges but certainly mean well.
Thank you, and the rest of the Guys who "Know a thing or two, about a thing or two" and put up with the rest of us tryin' to catch up!
There are quite a few of us who don't enter into these type of threads not on account we're not interested, don't care, or are just plain lazy..
I (We) are grateful for you all are willing to teach/inform us and just flat don't have anything to add of any value.
Tuck\o/
-
Hi I just got my cylinder back from plating and my new V-Force 3 in, and when I install the V-force it is very snug in the cylinder, like the reed stops and too wide for the opening in the cylinder and when installed they actually are squeezed a little. Is this NORMAL with V-3 ? Please anybody that has installed these please let me know. Thanks ERIC :?
Saturday I installed my V3 reeds with a 3/8" spacer and did not notice any interference or snuggness (is that a word), does the spacer alleviate the problem or did I get something wrong?
-
that looks small next to a standard reedblock and cage.I know in certain inlet places they make(4 stroke inlet tract/2 stroke ports) narrower to increase the charge speed but that looks like its been taken to the extreme.
-
here is a picture of the rad valve with the reed block machined off the area is very small
Thats what I want a rad valve for right there. Stewart does it look like theres enough metal to fit it to the V-force.
-
Stewart
You would be surpised on how small you could go with the tunnel before it causes performance problems. It all depends on the use of bike and motor.
-
I checked the rate of water flow between my v-force 3 and rad valve, and i had some interesting results..hopefully stewart can chime in.. I used a exact measure of water (about 12ounces) in each valve and the V-force was 24.89 sec to drain but the Rad valve was 46.7 sec and did not fully drain.. This has me stumped.. hopefully stewart or anybody else that tests there reed tension like this could help. Thanks :-D