ordered my progressive fork spring kit for the new magna i bought used. waited a month to get them from phat performance ,I get it all ready open the forks and schedule 40 1" pops out 4.75" piece. so i pulled the springs out and low and behold there progressives. so back in they go and the spacers I cut for the the new ones with them . and i have a set of progressives up for sale . pm or reply or email me at drncat@yahoo.com
Yeah except mine was the carbs and someone had put the jet kit in LOL
Quote from: easyriderx on April 02, 2011, 02:05:07 AM
i have a set of progressives up for sale . pm or reply or email me at drncat@yahoo.com
Since you had it apart, why didn't you put in the new springs and sell the used ones??
There must not be that much difference if you ordered new springs..
What are you thinking on the sale..
Did you compare them side by side to the new progressives? I ask because my stock springs were of a progressive type spring, but not nearly as good as the brand progressive ones.
I rather imagine the piece of PVC pipe used as a spacer is not Honda stock...
QuoteI rather imagine the piece of PVC pipe used as a spacer is not Honda stock...
still kind of like an assumption... still better to be thorough and check is all I am saying.
I added longer spacers on wife's Magna just to add a little preload to the stock springs, I was pleased with the results. Can you tell the difference between Progressive and stock just by looking at the springs?
Quote from: Charles S Otwell on April 03, 2011, 12:35:09 AM
I added longer spacers on wife's Magna just to add a little preload to the stock springs, I was pleased with the results. Can you tell the difference between Progressive and stock just by looking at the springs?
How long of a piece did you add, and what did you make the spacers out of??
Is there stock spacers and if there are, did you use your piece and the stock spacer or just your spacer.
Quote from: Charles S Otwell on April 03, 2011, 12:35:09 AM
Can you tell the difference between Progressive and stock just by looking at the springs?
IIRC, yes you can.
Yes the progressives are well progressive :lol: as in tighter wound on one end and the stocks are the same wind from one to the other..
QuoteYes the progressives are well progressive as in tighter wound on one end and the stocks are the same wind from one to the other..
Actually my stock springs were progressively wound at one end. Just not as tight or as much as the true progressives. The first time I pulled them out I thought I had progressives until I put them side by side with a brand name progressive springs. Which is why I made that comment, just so he could be sure.
Here is the post I put up about it at the time.
http://www.magnaownersoftexas.com/forums/index.php?topic=3100.0 (http://www.magnaownersoftexas.com/forums/index.php?topic=3100.0)
The 3rd gens are not they are one wind all the way now the 1st gens maybe that way but have never had the chance to work on them yet.
I have never worked on a 3rd gen, but in that old post Slydynbye put up a pic of his supposed stock 1994 springs and they are progressively wound too.
QuoteUmmm just a sec.
WOW that default photo size was BIG!
Here is what I pulled out of my 1994 Magna Forks I think they are stock.
(http://i42.tinypic.com/5bwfif.jpg)
The stock springs which Slydnbye posted have two winding pitches, but they are not progressive. There are, roughly, two different spring constants embedded in the design. To a first approximation, as one compresses this spring, the looser pitch will compress first, until it reaches about the pitch of the other end, whereupon the spring constant will change rather abruptly to something much larger.
Progressive windings have a continuously varying pitch, and their spring constant varies smoothly and continuously as the spring is compressed.
Recalling that the restoring force F=K*x, where K is the spring "constant" and x is the displacement, in the stock spring the value of K will change much more abruptly than with progressive springs. In a true progressive, the force/displacement equation will look more like F=K*x^y, where "^" denotes an exponent. if y=2, for example, the spring follows a square law. y does not have to be an integer, by the way, and probably isn't for these springs.
Interesting. but to someone not as smart as you, (see me), they would appear to be progressive. Regardless, my intent was only to help him out based on my experience.
Ok Lawrence-
Spouting fancy numbers and letters may get you laid by the ladies but on a bike forum it will get your a$$ kicked....
JOKING buddy!!
Quote from: Troystg on April 05, 2011, 09:07:25 AM
Ok Lawrence-
Spouting fancy numbers and letters may get you laid by the ladies but on a bike forum it will get your a$$ kicked....
JOKING buddy!!
I dont know whether those number and letters were fancy or not but I sure see a bunch of symbols with F and K in them. I only use those equations when my bike doesn't start!
Quote from: lragan on April 04, 2011, 03:37:33 PM
Recalling that the restoring force F=K*x, where K is the spring "constant" and x is the displacement, in the stock spring the value of K will change much more abruptly than with progressive springs. In a true progressive, the force/displacement equation will look more like F=K*x^y, where "^" denotes an exponent. if y=2, for example, the spring follows a square law. y does not have to be an integer, by the way, and probably isn't for these springs.
Do you mean the value of K will be extremely different between the 2 different springs? (not change more abruptly) This is interesting, never really got into "spring-math" before.
OK, I see where I have been a bit overbearing, to be kind about it. Sorry, didn't mean to put anyone down.
What I mean is that the stock spring pictured will have a rather sudden change in "feel" -- from a "soft" spring to a much "harder" one, once the compression reaches the point where the two pitches are pretty close to the same. This transition will be much more abrupt than in a progressive spring, which will gradually change from "soft" to "hard" as it is compressed.
I did not choose the letters for the equation, by the way -- they are in common use. Never caught any hidden meaning, but had to laugh when it was pointed out. :lol: :lol:
Quote from: Troystg on April 05, 2011, 09:07:25 AM
Ok Lawrence-
Spouting fancy numbers and letters may get you laid by the ladies but on a bike forum it will get your a$$ kicked....
JOKING buddy!!
You noticed that too! :P
QuoteOK, I see where I have been a bit overbearing, to be kind about it. Sorry, didn't mean to put anyone down.
What I mean is that the stock spring pictured will have a rather sudden change in "feel" -- from a "soft" spring to a much "harder" one, once the compression reaches the point where the two pitches are pretty close to the same. This transition will be much more abrupt than in a progressive spring, which will gradually change from "soft" to "hard" as it is compressed.
I don't think you actually did. All I was trying to point out for the original poster was that a stock spring can look very much like a progressive and to be sure and compare the two side by side before jumping to the conclusion that it already had progressive springs in it and never really being happy with the way it feels.
I don't think Lawrence was either, I just had to pick on him and this was a great opportunity.. :lol: