1981 Jota fork spring

Hi Marty. Just seen this and thought I could help, as I have my 2 original springs sitting in my garage.
I went down and measured them, BUT, one measures 455mm, the other 445mm :o :o
So I guess that aint really any help..............sorry (I was a bit surprised to say the least)
 
Shajota said:
Hi Marty. Just seen this and thought I could help, as I have my 2 original springs sitting in my garage.
I went down and measured them, BUT, one measures 455mm, the other 445mm :o :o
So I guess that aint really any help..............sorry (I was a bit surprised to say the least)
Click to expand...

I wonder how that can be?
10mm variance is huge, especially on stock springs.
 
10mm sack on 30+ year old springs isn't unusual as far as I know. I suspect that they may have been unequal length from new. The springs in my '77 900SS were about 6mm diff. when I changed them back in '79. Most all of the aftermarket springs are quite a bit shorter than the originals that I have swapped and are supplied with a length of tubing to make spacers out of so you can set the initial sag.
 
Have always thought a difference in spring length was intentional.  It will offer a progressive compression rate.  Just my 2C!
 
Nope. It won't give progressive rate. Assuming both springs have constant spring rate, when you add them together (for each fork leg) the total spring rate for the front end is still constant. Only thing different from springs of equal length is that one fork leg is carrying more weight than the other. Easily compensated for by different length spacers.
 
I was going to finish off my previous post with;  'Now wait until Cam comes back with how wrong I am ...'.  Thanks to Davo for the heads up!!

Yes it will...... so, it's your technical opinion versus mine.  Cancel all my meetings! we must reach a consensus.

How great is this internet thing? 

 
You must log in or register to reply here.
Back
Top