QA1 Rear Spring option... - Ex-500.com - The home of the Kawasaki EX500 / Ninja 500R
 
LinkBack Thread Tools
post #1 of 6 (permalink) Old 7-3-2019, 1:01 PM Thread Starter
Member
 
ruxpin76's Avatar
 
Join Date: Mar 2018
Location: King, NC
Posts: 93
 
Garage
QA1 Rear Spring option...

Don't know if this has been covered here, but may be a good rear spring option for stock owners....



Here's a 400# option w/ 1-7/8" ID: https://www.speedwaymotors.com/QA1-8...ng,260745.html

and an assortment: https://www.speedwaymotors.com/shop/..._height:129852


I have a SV650 shock that I was going to install, but now that I've found these, I may preserve the stocker and just swap spring out... no eye bolt hassle or mods that way.

I'm 80% of the way through the front fork spring cut mod too.....2004 Gen2 in great shape, just needs some handling upgrade.

Last edited by ruxpin76; 7-3-2019 at 1:13 PM.
ruxpin76 is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 7-3-2019, 1:32 PM Thread Starter
Member
 
ruxpin76's Avatar
 
Join Date: Mar 2018
Location: King, NC
Posts: 93
 
Garage
On discount....got 1. A few left:

https://www.ebay.com/itm/382932976106

1997 GZ250 / 2012 CBR250R / 2004 SV650 / 2015 CBR500R / 2014 NINJA 300 / 2004 EX-500
ruxpin76 is offline  
post #3 of 6 (permalink) Old 7-3-2019, 2:00 PM Thread Starter
Member
 
ruxpin76's Avatar
 
Join Date: Mar 2018
Location: King, NC
Posts: 93
 
Garage
FWIW, I have access to a CNC router, so I'm going to design a Preload adjuster that works THROUGH the stock handlebars with a simple hole drilled through the center of the cap. Likely to be an aluminum cylinder with a allen head cap screw that is accessible through a hole in the handlebar cap (removable rubber plug lives in hole...) Here's the concept. Should I make some?

Fork top is to the left, body to the right. The split upper takes the spring tension and wedges the top in place since we don't have a conventional threaded cap. Nuts are loctited in place and serve as travel stops. Cylinder is threaded and moves up and down with allen key bolt turns. The only downside here is a lack of indexing, but I could probably find a way to add that via a notch in the bolt head or something. Future upgrade... Concept and drawing (c) 2019-07-03 Ted Hamilton
Attached Images
File Type: jpg 20190703_134319.jpg (229.4 KB, 8 views)

1997 GZ250 / 2012 CBR250R / 2004 SV650 / 2015 CBR500R / 2014 NINJA 300 / 2004 EX-500

Last edited by ruxpin76; 7-3-2019 at 2:12 PM.
ruxpin76 is offline  
 
post #4 of 6 (permalink) Old 7-4-2019, 1:32 PM
fog
Senior Member
 
Join Date: Oct 2006
Location: Mt home, AR
Posts: 19,012
 
Don't unless you can make the screw pressure tight (no I don't know how much pressure. I have made a set of these things and they proved to be useless . the air head above the oil level is like a cylinder and the oil is like a piston. The air has a compression ratio changing the oil level changes that ratio and has a lot to doo with the fork performance like a fie tune for the spring. If you adjustment device causes the loss of this air you fork performance will be dramatically impaired .not improved.
Preload is only done once when you set sag fine adjustment are the mad with the oil level. careful not to go too fare and induce hyd. lock.
Also that thing looks long enough to seriously displace the air in the top of the tube drastically rasing the CR or requiring a lowering on the oil level to maintain a effective CR.
In short, ( should I make it?) answer No

FOG

I hate PMs if you want to contact me, find my email address.Look in the for sale section.

Last edited by fog; 7-4-2019 at 1:37 PM.
fog is offline  
post #5 of 6 (permalink) Old 7-4-2019, 8:42 PM Thread Starter
Member
 
ruxpin76's Avatar
 
Join Date: Mar 2018
Location: King, NC
Posts: 93
 
Garage
Fair enough. Not a good way to access it either. I did your front spring mod today. 500x better. OEM spring and spacer were 20-7/8" long, 17" on spring, 3-7/8 on spacer. I cut spring down to 12.5" and extended (made new) spacer to 8-3/8" long. Rounded off brake caliper bolts from prev. owner slowed me down a bit, but it all went back together nicely with new dust and fork seals. Right side had started leaking a couple weeks ago, so i did it all at once. One of these new QA1 springs will show Monday. I'll install once back from vacation. Looks like I'll have to remove battery to access shock? Ill do the FOG airbox mod once tail and battery are off... Have a happy 4th!!

1997 GZ250 / 2012 CBR250R / 2004 SV650 / 2015 CBR500R / 2014 NINJA 300 / 2004 EX-500
ruxpin76 is offline  
post #6 of 6 (permalink) Old 7-5-2019, 12:44 PM
Senior Member
 
Join Date: Mar 2018
Posts: 210
 
Quote:
Originally Posted by ruxpin76 View Post
One of these new QA1 springs will show Monday. I'll install once back from vacation. Looks like I'll have to remove battery to access shock? Ill do the FOG airbox mod once tail and battery are off... Have a happy 4th!!
I replaced the rear shock on mine a couple of years ago. Damned if I can remember exactly what I had to remove to get access, but I do remember that it wasn't all that hard a job. I think I had to put some blocks under the center stand so the wheel and links would drop enough to make some clearance.

Before you take it apart, be sure to measure the existing rear ride height so you have a target to aim for once the new spring is installed. Leave the adjusting rings loose so you can adjust the height with the shock in the bike. (You can reach in there using a long dull screwdriver and hammer or similar tool.) You can do the final tightening once you have the height where you want it. You will likely want to use the original height as a minimum plus a little to match your stiffer front end. Put some paint marks on the rings after you do the final tightening as a check to make sure nothing has moved later on.

Don't be afraid to experiment to get the handling you like and let us know how it all went. Read up on FOG bones elsewhere on this forum for a discussion on the effect of changing rear ride height.
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ex-500.com - The home of the Kawasaki EX500 / Ninja 500R 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



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