Suzuki Quadracer HQ
LT250R Quadracer => LT250R - Engine => Topic started by: Quest96 on March 10, 2014, 05:47:57 am
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Reed valve design and function is very complicated and requires a lot of testing. Total tip flow area is very important but flow is typically reduced each time a divider is added.
The reed cage that has the least amount of dividers across the width of the cage will usually have the greatest POTENTIAL for flow, but the window may be too wide for some petals if they need to be a certain thickness to resonate properly for a particular engine RPM.
If the total flow area was the only variable, the best reed would only have one wide window on each side of the reed block "V". With one wide window on each side of the reed block "V", the reed petals would fail all most instantly using the petal thickness that will have the correct resonance. It would cave in because one large reed petal would not be strong enough when the piston is descending and building pressure in the crankcase.
If we use "stiffer " petals to bridge a reed cage window that is slightly too wide, the resonance RPM will be raised and flow and power at lower RPMs will be reduced. It requires a lot of testing to find the proper thickness and petal length for a given size window. After window size and petal thickness have been optimized, the internal shapes have to be developed that will make the best flowing transition from the carb to the tips of the petal.
A engine that makes a lot of power has a reed that flows real well, but a reed assembly that flows real well may not make very much power unless all the design variables are correct for that particular engine.
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Back to back track testing proved to me what reeds are better. It was alot of head scratching tho because the 3's look like they would crush the 2's there is alot more room for air flow. Then again what do I know im the slow guy around here.
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Don't plan on it for a while if ever is what tassinari told me.
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Must have VF4. The others don't compare.
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2s ftw
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I work about 10 mile from hanging rock but have never rode there
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Not sure on the zilla, but on a banshee, the VF2 were a drag reed, had more flow and better top end, the VF3 was more a trail reed offering better low end and better throttle response. But **** those old reeds VF4 is better than both.
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I'm going to either hanging rock or perry in a few weeks come out then!? Looking like I'm not going to make the SL trip.
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ok run your 2's and i will see you at the dunes with my 3's.. :)
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That's what tassinari said when I asked about the differences. They said that's not the case in all platforms.
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V2's are old tech! You can get them cheap!!! haha
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i might have to disagree with you buck, there is no gain of power from the 3's to the 2's.. everyone is just hung up on the V2 reeds for some odd reason.
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The only improvement was no screws in the cage that could potentially come out and get eaten by a cylinder. To do this they had to sacrifice something which was flow rate and reed tension. The v2's are supposed to have snappier throttle response and a little more power throughout the curve very small increase for the Suzuki platform, from my talkings with moto tassinari.
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actually i dont think they would make a set of reeds that would flow less air, if anything they make improvments on them,
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2s flow more air.
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Can anyone tell me why the V2s are better? I actually have both, recently decided to stick a set of V3's on my 90 lt250r. I really didn't notice much of a difference, I just liked the screw-less design of the v3s more.
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Those are small reed v3's his v2's are large reed.
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These are the v3's I just picked up ,I am not able to install till
This weekend very.....excited!
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i know i told him you got the best reeds in it already.
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My cousin had a 2013 KTM 300 that came with VF4's from the factory. I thought that was badass
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my cuz just bought a brand new ktm250sx and it had v force reeds on it from the show room floor.
not sure if the shop put them on or factory, but he has them.
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theres a ktm model. its been around for a few years. i think it was the first vf4 offered, which makes me think ktm had a hand in it. either financially or otherwise
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pretty sure they only make them for the banshee and blaster. they might have a ktm model, but not 100%.
they need to make a v4 for the cr250 as some banshee jugs use that reed.
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Does anyone know when V4's will be out for the 500? I've seen a dyno between V3 and V4 on a Banshee and now want one.
you may be waiting a very long time. theyre not even available for very popular bikes like cr250
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Here's a picture of Jerry's 87 V2 cage and adaptor plate.
(http://i1298.photobucket.com/albums/ag57/Buckeye513/D0B064F4-681A-49B6-B518-EED580BC2339_zpsgdhw19mg.jpg) (http://s1298.photobucket.com/user/Buckeye513/media/D0B064F4-681A-49B6-B518-EED580BC2339_zpsgdhw19mg.jpg.html)
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Yes these are for the large cage..
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My small reed cage has 2 pedals the large reed cages have 3 I thought.
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What year them for my 2s have 2 pedal on each side.
the vf2's i have here also only have 2 petals.
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What year them for my 2s have 2 pedal on each side.
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I talked to moto tessenari when I ordered my replacement v2 pedals and she wasn't sure if or when it would be released.
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Does anyone know when V4's will be out for the 500? I've seen a dyno between V3 and V4 on a Banshee and now want one.
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I bought a used set of v2's on eBay for $75 add said v3's as well.
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Awesome, thanks that's what I thought. The ad says they we never run but installed and the quad had an electrical problem.
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Those are 2's. $100 is a pretty good deal.
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I just picked these up on ebay. I think they are v2's. Does anyone know for sure. The listing said v3 bit I'm sure their not v3. I picked em up for a $100... was it a good deal?