Cut your fork springs!? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
V-Strom Modifications and Performance The brag page, good and bad.

 
LinkBack Thread Tools Display Modes
post #1 of 10 Old 03-06-2009, 10:06 AM Thread Starter
Evolving Curmudgeon
 
kick's Avatar
 
Join Date: Feb 2008
Location: Red Pines and a fire-pit
Posts: 1,119
Cut your fork springs!?

I've been researching fork springs and read a post here that said the fork springs can be shortened 2-3" (cut-off) and that by adding a spacer equal to the length of the portion that was cut off, the fork spring is now effectively stiffer. Kinda makes sense to me and eliminates the need for buying a set of springs. Any thoughts?

'07 WEE-HAAAA! Blue, loaded & sweet

I'll know where I'm supposed to be when I get there.
kick is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 03-07-2009, 06:49 AM
Stromthusiast!
 
Join Date: Aug 2007
Location: Omaha, NE
Posts: 7,477
Well

Kinda depends on what shape the springs are in to start with. If they're already shorter than spec, they've started to sag. Cutting them shorter will stress them more (fewer coils to bear the load) and they'll likely really sag then. If they're fresh, it might work, but you've gotta watch out for coil binding. If the suspension travel compresses the spring sufficiently that all the space is used up between the coils, the suspension will bottom VERY harshly, and perhaps damage some parts (I doubt the top caps are designed to handle that much stress). Cutting a coil or two would probably be OK, but much more is likely to lead to trouble. You'd need to measure distance from spring seat to seat, fork fully extended and fully compressed, measure the spring wire thickness and gap between coils, deduct spacer length, and see if there will be any gap between coils at full compression. By the time you do all that (twice, to make sure there's no mistake), then cut a couple of coils, bend, grind and polish a new end on each spring (so you don't tear up the seats), clean the springs very carefully (filings in the damper assembly are bad), make new spacers, and maybe find out you still don't have enough stiffness, you might have been better off buying new springs of known stiffness that come ready to drop in. Unless you are really short of money, and have a lot of time on your hands.
Jimding is offline  
post #3 of 10 Old 03-07-2009, 09:49 AM
Stromthusiast!
 
Join Date: May 2007
Location: Richmond, VA
Posts: 413
Quote:
Originally Posted by kick View Post
I've been researching fork springs...

Here's a link with some info, including the limits on what you can achieve with shortening the springs.
LINK
Gramps is offline  
 
post #4 of 10 Old 03-07-2009, 07:36 PM
Stromthusiast!
 
E-Nigma's Avatar
 
Join Date: Aug 2008
Location: Durham, NC
Posts: 382
Send a message via AIM to E-Nigma
Is it possible to create a stiffer fork by using longer spacers than stock, but keep the springs at stock length?

In effect it should increase preload, but if the stock springs are not progressive, then would it change the fork's stiffness?

09 Orange DL650

"Your attitude is the only difference between an ordeal and an adventure"
E-Nigma is offline  
post #5 of 10 Old 03-08-2009, 06:51 AM
Stromthusiast!
 
Join Date: Aug 2007
Location: Omaha, NE
Posts: 7,477
Nope

The 'spring constant' doesn't change with longer spacers. If it takes 100 lbs to compress the springs an inch, adding preload will change the ride height (initial suspension position), probably, but adding 100 lbs will still compress the spring another inch. So if the springs were too weak to start (excess bottoming), they'll still be too weak. On the other hand, adding a little extra fork oil can increase the air-spring effect, if the springs are marginally too weak. But too much oil can blow your fork seals. The only real solution to weak or worn springs is new springs.
Jimding is offline  
post #6 of 10 Old 03-08-2009, 11:45 AM
Super Moderator
 
Big B's Avatar
 
Join Date: May 2005
Location: Central OHIO "Go Buckeyes"
Posts: 16,517
Garage
If you cut your springs.....that is exactly what you end up with. Spend the money and upgrade your springs/oil, no right way to do a wrong thing.

BRIAN "GO Buckeyes, GO Wildcats"!

2015 DL650 XT "Hector"

1997 Honda Valkyrie 1500 custom “Dolores”




Big B is offline  
post #7 of 10 Old 03-08-2009, 02:01 PM
Stromthusiast!
 
Warhammer's Avatar
 
Join Date: Aug 2008
Location: North Texas
Posts: 2,117
If you do decide to cut your springs, take a coil or two out of the middle. That way you still have the nice factory finish on both ends.
Warhammer is offline  
post #8 of 10 Old 03-14-2009, 04:34 PM Thread Starter
Evolving Curmudgeon
 
kick's Avatar
 
Join Date: Feb 2008
Location: Red Pines and a fire-pit
Posts: 1,119
Nuff said, think I'll buy some springs.

'07 WEE-HAAAA! Blue, loaded & sweet

I'll know where I'm supposed to be when I get there.
kick is offline  
post #9 of 10 Old 03-15-2009, 11:20 AM
RTL
Stromthusiast!
 
RTL's Avatar
 
Join Date: Jul 2008
Location: South Louisiana
Posts: 84
Garage
I tried cutting the stock springs on my Vee. I cut them as short as possible without getting into coil bind at complete compression. The result was stiffer than stock but still not stiff enough for my liking. Just installed Sonic's 1.0 springs and now the front end is properly sprung.
RTL is offline  
post #10 of 10 Old 03-15-2009, 01:33 PM
Stromthusiast!
 
Join Date: Dec 2008
Location: Pacific Northwet
Posts: 651
Quote:
Originally Posted by Warhammer View Post
If you do decide to cut your springs, take a coil or two out of the middle. That way you still have the nice factory finish on both ends.

+2








































:mod_lol:

DL1000K8

So what is it, am I a smart*** or a dumb***? Maybe I'm just an ***hole.
10guy is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome