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 17-08-16, 05:57 PM   #11
Bibio
Member
Mega Poster
 
Bibio's Avatar
 
Join Date: Jul 2008
Location: here as devil's advocate
Posts: 11,569
Default Re: Front suspention issue

before you do anything wrap a cable tie round one of the fork legs at the dust seal then check it after a few days/weeks to see how far up it has travelled.

oil does absolutely nothing to help with the weight on the bike, oil only controls the rate at which the spring inside the forks compresses/rebounds. yes a refresh of the oil will make it 'feel' better but wont stop a 'soft' spring from letting the forks bottom out.

the stock spring rate is that for someone at a weight of 8st so adding an extra 5st is putting the spring rate way over what it was designed for which in turn makes it compress easier.

you could be lucky and someone might have already changed the springs and if so then a change of oil might just be the ticket.

your already taking the forks off so why not do it right.
Bibio is offline   Reply With Quote
Old 17-08-16, 06:24 PM   #12
sl0th86
Guest
 
Posts: n/a
Default Re: Front suspention issue

Yeah true! I seeeeee, yeah i mite as well then, thanks a lot for your help mate much appreciated!


Sent from my iPhone using Tapatalk
  Reply With Quote
Old 17-08-16, 07:38 PM   #13
embee
Member
Mega Poster
 
embee's Avatar
 
Join Date: Jul 2003
Location: Warwickshire
Posts: 2,804
Default Re: Front suspention issue

I have a curvey also, and recognise exactly what you describe. As Bib says, you need springs.


I'm 12st and use 0.85 linear springs from http://www.ktechsuspension.com/
I'd say for you the 0.9 would be just right.


I'd also definitely recommend Fuchs/Silkolene "Maintain" RSF oil, it has good technical specs. Personally I found the RSF 7.5W works quite well with the stock fork internals, it is actually more comparable to most other 10W oils (see table here http://www.peterverdone.com/archive/lowspeed.htm showing actual viscosities ). You may find it a touch soft with those springs on rebound, but I'd suggest it as a start before going to the 10W version. If you still have the original oil in there it will be like grey dishwater now.
__________________
"Artificial Intelligence is no match for natural stupidity"
embee is offline   Reply With Quote
Old 17-08-16, 07:46 PM   #14
sl0th86
Guest
 
Posts: n/a
Default Re: Front suspention issue

Nice one embee im going to look into it and hopefully get it sorted! Its the only downfall i can think of on this bike!


Sent from my iPhone using Tapatalk
  Reply With Quote
Old 18-08-16, 07:01 AM   #15
Blapper
Member
 
Blapper's Avatar
 
Join Date: Jun 2016
Location: Rochester,Kent.
Posts: 824
Default Re: SV Front suspention issue

If it's ok with you guys I will passenger on Joe's thread: I find the front soft under braking AND harsh over bumps so I am intrigued by these 'emulators'. As I am only 12 stone, I'd like to keep light suspension, but have less dive under braking. Is this possible? I've done the up-rate on oil viscosity on other bikes and it just doesn't cut it for me.
Blapper is offline   Reply With Quote
Old 18-08-16, 07:11 AM   #16
sl0th86
Guest
 
Posts: n/a
Default Re: SV Front suspention issue

Looks like we both mite need new springs and oil? lol


Sent from my iPhone using Tapatalk
  Reply With Quote
Old 18-08-16, 12:55 PM   #17
Bibio
Member
Mega Poster
 
Bibio's Avatar
 
Join Date: Jul 2008
Location: here as devil's advocate
Posts: 11,569
Default Re: SV Front suspention issue

a mentioned by tom in post 2 get linear springs and under no circumstances get progressive no matter how inviting the price looks.

you will never stop dive on damper rod forks unless you use some mechanical method of doing so such as emulators but you can control the rate at which it does by using different oil viscosities without the emulators.

linear springs to match your weight.
silkoline maintain rsf 7.5wt oil.
weld and dress the rebound holes on the damper rods.

doing the three things above will satisfy most people.
Bibio is offline   Reply With Quote
Old 18-08-16, 08:04 PM   #18
Blapper
Member
 
Blapper's Avatar
 
Join Date: Jun 2016
Location: Rochester,Kent.
Posts: 824
Default Re: SV Front suspention issue

What are 'emulators' Bibio?
Blapper is offline   Reply With Quote
Old 18-08-16, 09:19 PM   #19
Bibio
Member
Mega Poster
 
Bibio's Avatar
 
Join Date: Jul 2008
Location: here as devil's advocate
Posts: 11,569
Default Re: SV Front suspention issue

Quote:
Originally Posted by Blapper View Post
What are 'emulators' Bibio?
https://www.youtube.com/watch?v=j3QYZEQoN_M
Bibio is offline   Reply With Quote
Old 19-08-16, 07:42 AM   #20
Blapper
Member
 
Blapper's Avatar
 
Join Date: Jun 2016
Location: Rochester,Kent.
Posts: 824
Default Re: SV Front suspention issue

Thanks, looks promising for when I refinish mine.
Blapper is offline   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
Pointy front end issue andrewsmith SV Talk, Tuning & Tweaking 12 10-08-14 09:18 AM
ZX6 front sprocket issue. zobers Bikes - Talk & Issues 14 23-11-10 09:53 PM
Front brake issue gruntygiggles Bikes - Talk & Issues 16 25-06-10 10:56 AM
Wanted! Lowered seat and kit to lower the rear suspention bikebunny Stuff Wanted 3 10-03-09 10:32 PM
Potential front disc issue. DanAbnormal Bikes - Talk & Issues 2 20-01-08 05:12 PM


All times are GMT. The time now is 12:21 AM.


Powered by vBulletin® - Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.