SV650.org - SV650 & Gladius 650 Forum



SV Talk, Tuning & Tweaking Discussion and chat on all topics and technical stuff related to the SV650 and SV1000
Need Help: Try Searching before posting

Reply
 
Thread Tools
Old 01-11-11, 10:40 PM   #1
sath182
Guest
 
Posts: n/a
Default Oil level/Air gap fork question.

I getting ready to have my stock suspension upgraded to ricor intiminators with .85 weight springs and 5wt oil (I'm not having my rods modded), and I'm looking for advice on what the air gap should be set to before buttoning it all back up. I've been looking around and I've seen 110mm pop up a couple of times, but I've also seen people use the stock level and as low as 137mm.
  Reply With Quote
Old 01-11-11, 10:54 PM   #2
k1ngy SV
Guest
 
Posts: n/a
Default Re: Oil level/Air gap fork question.

might not be the best place to ask this sorry, but how much would it be to do this what your doing? and how long ? (my myself ofcourse) thanks inadvance Adam
  Reply With Quote
Old 02-11-11, 04:46 AM   #3
sath182
Guest
 
Posts: n/a
Default Re: Oil level/Air gap fork question.

k1ngy, take a look at this for the process.
http://forum.svrider.com/showthread.php?t=78075

price wise, i bought the matching shock brand new so i'm already up in price be a good US$500.
  Reply With Quote
Old 02-11-11, 03:09 PM   #4
yorkie_chris
Noisy Git
Mega Poster
 
yorkie_chris's Avatar
 
Join Date: Apr 2007
Location: Halifax/Leeds
Posts: 26,645
Default Re: Oil level/Air gap fork question.

5wt? Let me know how stable that is mid corner

Whatever air gap you want, within reason. It controls bottoming resistance, stiffness at bottom of stroke. I would start at 125mm.
__________________
Currently Ex Biker
Now rebuilding a 63' fishing trawler as a dive boat
yorkie_chris is offline   Reply With Quote
Old 02-11-11, 04:04 PM   #5
sath182
Guest
 
Posts: n/a
Default Re: Oil level/Air gap fork question.

The way I see it, 5wt is still going to be better than stock oil. So with 125mm I should be getting most of the available travel with less risk of bottoming or hydro-locking the forks? I suppose 110mm would have mostly the same effect but harsher?

Last edited by sath182; 02-11-11 at 04:58 PM.
  Reply With Quote
Old 02-11-11, 04:52 PM   #6
sath182
Guest
 
Posts: n/a
Default Re: Oil level/Air gap fork question.

just thought of something, is your suggestion based on a heavier weight oil? i'm thinking the heavier weight would create more air pressure on compression as it moves through the valve a little slower, or is that an insignificant difference. (noob, i know)
  Reply With Quote
Old 02-11-11, 07:07 PM   #7
yorkie_chris
Noisy Git
Mega Poster
 
yorkie_chris's Avatar
 
Join Date: Apr 2007
Location: Halifax/Leeds
Posts: 26,645
Default Re: Oil level/Air gap fork question.

Doesn't matter, the air chamber is pretty well above the hydraulic goings on, the air spring effect is separate from the damping curves.

Yeah with 110 you will get into harshness sooner, I think it is better to have as linear as possible so feel is same and rebound too. When braking hard I found a bit of instability when using bit of travel that was becoming very progressive, similar but not as marked effect on progressive springs. I put this down to a decent low speed rebound (for rest of travel) setting ending up too fast at bottom.
__________________
Currently Ex Biker
Now rebuilding a 63' fishing trawler as a dive boat

Last edited by yorkie_chris; 02-11-11 at 07:12 PM.
yorkie_chris is offline   Reply With Quote
Old 02-11-11, 07:40 PM   #8
sath182
Guest
 
Posts: n/a
Default Re: Oil level/Air gap fork question.

Ok, I just checked the fluid specs in my manual. Too bad the thing was in storage when I bought the components cause you were right about the 5wt. I just decided to get whatever was recommended by Ricor when I bought the parts. And actually, I thought that the stock oil was 5wt anyway. I keep hearing it referred to as water. I'll just have the right oil put in when the work is done. Any suggestions on brand since availability is likely to be different than in the US?

Last edited by sath182; 02-11-11 at 07:45 PM.
  Reply With Quote
Old 02-11-11, 11:06 PM   #9
embee
Member
Mega Poster
 
embee's Avatar
 
Join Date: Jul 2003
Location: Warwickshire
Posts: 2,801
Default Re: Oil level/Air gap fork question.

This guy has put together a table of example real oil viscosities to choose from. Look for a high Viscosity Index (values 300+ are good). Select your oil from the actual viscosity at 40C rather than the nominal "weight".

Based on his table I have been using Silkolene PRO RSF with pleasing results so far.

He seems to like Red Line if that's more readily available.
__________________
"Artificial Intelligence is no match for natural stupidity"
embee is offline   Reply With Quote
Old 03-11-11, 02:16 AM   #10
zadar
Guest
 
Posts: n/a
Default Re: Oil level/Air gap fork question.

Quote:
Originally Posted by sath182 View Post
Ok, I just checked the fluid specs in my manual. Too bad the thing was in storage when I bought the components cause you were right about the 5wt. I just decided to get whatever was recommended by Ricor when I bought the parts. And actually, I thought that the stock oil was 5wt anyway. I keep hearing it referred to as water. I'll just have the right oil put in when the work is done. Any suggestions on brand since availability is likely to be different than in the US?
With ricor you should use thin oil, it is design for it. However you will have problem with rebound. If you use thicker oil you will have problem with both, compression and rebound. There is also problem with high speed and mid corner as Yorkie mentioned. We tried that valve but could never get feel what front is doing.
Try thin oil and closing rebound hole, may work fine.
  Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Recomendations on fork oil level please curvy custard SV Talk, Tuning & Tweaking 16 09-02-11 01:26 PM
fork oil capacity/ level stuballs SV Talk, Tuning & Tweaking 7 12-01-09 12:42 PM
Question about oil level Woz SV Talk, Tuning & Tweaking 11 30-04-08 09:48 AM
Fork Oil level SVStu SV Talk, Tuning & Tweaking 8 19-09-07 03:10 PM
Fork Oil Level Daglad SV Talk, Tuning & Tweaking 4 02-01-06 11:35 PM


All times are GMT. The time now is 09:03 PM.


Powered by vBulletin® - Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.