Shock collar adjustment - Honda RC51 Forum : RC51 Motorcycle Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 08-02-2014, 11:59 AM Thread Starter
Member
 
Join Date: May 2014
Location: PORTLAND OR
Posts: 32
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Shock collar adjustment

Hey guys, I picked up an ohlins HO204 from a member on here and I have a question about it. The collar above the spring, that sets installed spring height, I guess its called spring preload? It is ratcheted down real far compared to other photos that Ive seen of these shocks.
Looking at it closer, it seems that I would need to remove a pin and also my remote adjuster just to allow this collar to be rotated. At that point I still dont have a wrench to turn the collar and nor do I know where to set it at.
Really at this point I would like to just set the shock at factory settings. I have the factory manual and know how to adjust all the settings, except this collar. does anyone know what I should do?
mikeyd is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 08-02-2014, 01:36 PM
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
Read this thread through

https://www.rc51forums.com/forums/sho...r+shock+spring


My Öhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!
MakisRC51 is offline  
post #3 of 13 (permalink) Old 08-02-2014, 01:39 PM
Moderator
 
SubSailor's Avatar
 
Join Date: Oct 2008
Location: Sarasota, FL
Posts: 6,456
Mentioned: 24 Post(s)
Quoted: 88 Post(s)
I'm assuming you're referring to the HO204 with hydraulic preload adjuster.

What is done during assembly is to measure the height of the hydraulic preload adjuster at zero preload adjust.
Then the amount of installed preload is calculated based on spring rate.

The two collets are then threaded onto the shock body with the collet having the preload adjuster locating notch oriented for where the adjuster hose is to be routed, then the locking collet is secured against the other collet.

The hydraulic adjuster is slid over the shock body, followed by the spring, and placed into a shock spring compressor.
The bottom spring seat/retainer is then mounted and shock assembly removed from the spring compressor.

The removal is the reverse.
With a shock spring compressor, the job is super easy.
You will not be able to remove the preload adjuster unit without a spring compressor.

Last edited by SubSailor; 08-02-2014 at 01:48 PM.
SubSailor is online now  
 
post #4 of 13 (permalink) Old 08-03-2014, 11:19 PM Thread Starter
Member
 
Join Date: May 2014
Location: PORTLAND OR
Posts: 32
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
With the hydraulic preload adjuster removed, will it need to be bled when it is re installed?
Also, the Ohlins manual says I should run 20mm of preload. Is this what how that should be measured? If so then I am at 33mm of spring preload.
Attached Thumbnails
Click image for larger version

Name:	spring preload.jpg
Views:	98
Size:	73.3 KB
ID:	66177  
mikeyd is offline  
post #5 of 13 (permalink) Old 08-04-2014, 01:07 AM
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
Quote:
Originally Posted by MakisRC51 View Post
I believe LDH clarify that inside the thread above


My Öhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!
MakisRC51 is offline  
post #6 of 13 (permalink) Old 08-04-2014, 11:41 AM
Moderator
 
SubSailor's Avatar
 
Join Date: Oct 2008
Location: Sarasota, FL
Posts: 6,456
Mentioned: 24 Post(s)
Quoted: 88 Post(s)
Quote:
Originally Posted by mikeyd View Post
With the hydraulic preload adjuster removed, will it need to be bled when it is re installed?
Also, the Ohlins manual says I should run 20mm of preload. Is this what how that should be measured? If so then I am at 33mm of spring preload.
The HO204 (many if not most Ohlins shocks) has a 10mm internal top-out spring.
So the 20mm installed preload compensates for the 10mm top-out spring travel plus 10mm for the shock spring.

Without a top-out spring, the installed preload would be 10mm, but with a top-out spring, if the shock was to become fully extended and the top-out spring compressed while weighted with the rear wheel/tire installed, then the spring would enter a negative preload condition where the spring would have no tension at all.

Then the lower spring seat could possibly fall off, leaving the rear suspension-less, with total loss of control.
SubSailor is online now  
post #7 of 13 (permalink) Old 08-04-2014, 01:54 PM
Senior Member
 
LDH®'s Avatar
 
Join Date: Mar 2010
Posts: 2,212
Mentioned: 7 Post(s)
Quoted: 331 Post(s)
Quote:
Originally Posted by mikeyd View Post
Hey guys, I picked up an ohlins HO204 from a member on here and I have a question about it. The collar above the spring, that sets installed spring height, I guess its called spring preload? It is ratcheted down real far compared to other photos that Ive seen of these shocks.
Looking at it closer, it seems that I would need to remove a pin and also my remote adjuster just to allow this collar to be rotated. At that point I still dont have a wrench to turn the collar and nor do I know where to set it at.
Really at this point I would like to just set the shock at factory settings. I have the factory manual and know how to adjust all the settings, except this collar. does anyone know what I should do?
1. What is the number on the installed spring?

2. How much do you weigh with or without gear?

3. Are you using an aftermarket linkage?
LDH® is offline  
post #8 of 13 (permalink) Old 08-07-2014, 01:54 AM
GWS
Senior Member
 
GWS's Avatar
 
Join Date: Sep 2013
Location: Minneapolis
Posts: 185
Mentioned: 1 Post(s)
Quoted: 13 Post(s)
You cannot adjust the collar pre-load on an HO204 without first removing the spring.
GWS is offline  
post #9 of 13 (permalink) Old 08-12-2014, 10:58 PM Thread Starter
Member
 
Join Date: May 2014
Location: PORTLAND OR
Posts: 32
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
In answer to LDH, I weigh 185 lbs with gear on. I have the stock linkage. My &%*&^ self installed the shock without writing down what was on the spring. But I stuck my phone up in there on video mode and managed the catch this "....... 105 L174" Can any sense be made from those numbers?
mikeyd is offline  
post #10 of 13 (permalink) Old 08-12-2014, 11:46 PM
Senior Member
 
LDH®'s Avatar
 
Join Date: Mar 2010
Posts: 2,212
Mentioned: 7 Post(s)
Quoted: 331 Post(s)
At 185 in gear with a stock link you need a 95Nm spring, you could even get by with a 90 if you had to.

The spring you have is a 105Nm which is 2 rates higher than you require.
LDH® is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda RC51 Forum : RC51 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