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 06-05-18, 03:47 PM   #11
Bibio
Member
Mega Poster
 
Bibio's Avatar
 
Join Date: Jul 2008
Location: Dreich Fife (its grey and miserable)
Posts: 10,558
Default Re: Rear preload for a lighter rider?

Quote:
Originally Posted by Frank_drebbin View Post
It slowly seems to be making sense. Here is a very clear video on what to do:

https://www.youtube.com/watch?v=TMDCEU98_9w

I will try setting this up. Thanks.
pretty much except that you dont adjust for rider sag. this is the biggest common mistake that people make because they dont want to face the fact that the spring rate is wrong.

you check and then set static sag to 10mm for road use.

you then put the rider on and check the rider sag 30-40mm.

lets say:
bike off ground (free sag) 500mm

your static sag (bike on ground and upright) should be as near to 510mm as possible for road use.

your rider sag (bike on ground and upright with rider) should be 530-540 with nearer the higher number better for road use.

if the rider sag does not fall in between the 530-540mm range then you need to change the springs. do not wind the preload up or down to match the rider.

always SET static sag and leave it there. changing the rider sag with using the preload will also change the static sag.

however, lets say if you have a rider sag of 545mm and a static sag of 10mm you can wind the preload down by 5mm to achieve the correct numbers. the only problem with this is that you are now going into race setup settings which are no good for road use.

the above is also true in the opposite direction. lets say your static sag is 10mm and the rider sag is 525mm you cant add 5mm to the static sag to increase the rider sag as the static sag would then be 15mm.

a few mm here or there is not going to make that much odds in the grand scheme of things so dont fret too much about numbers as long as your not getting wildly large increases/decreases.

why do you need static sag?
simple, during braking in particular if you dont have a negative number then your suspension "tops out" too soon so more inclined to lift the rear wheel off the ground during braking. this then upsets the chassis for corner entry and or emergency stops. with race settings things are a lot more precise and the front setup is matched to the rear using stiffer spring rates.
Bibio is offline   Reply With Quote
Old 06-05-18, 03:59 PM   #12
SV650rules
Member
 
Join Date: Nov 2016
Location: Shropshire UK
Posts: 577
Default Re: Rear preload for a lighter rider?

IMHO just ride and enjoy the bike, don't get too technical as majority of riders will reach their limit long before the bike does ,- maybe when you have ridden bike for a while think about improving suspension. Every standard bike setup is a compromise but if you start worrying about things it will undoubtedly spoil your enjoyment. I would be more inclined to spend any spare money on front fenda extenda and radiator guard, a hugger if you like the look, and good set of tyres also maybe an ABBA stand.
__________________
SV650 AL7

Fear knocked on the door, Hope answered and when he opened the door there was nobody there.
"Twenty years from now, you will be more disappointed by the things that you didn't do than by the ones you did do"- Mark Twain
SV650rules is offline   Reply With Quote
Old 06-05-18, 04:17 PM   #13
Bibio
Member
Mega Poster
 
Bibio's Avatar
 
Join Date: Jul 2008
Location: Dreich Fife (its grey and miserable)
Posts: 10,558
Default Re: Rear preload for a lighter rider?

Quote:
Originally Posted by SV650rules View Post
IMHO just ride and enjoy the bike, don't get too technical as majority of riders will reach their limit long before the bike does ,- maybe when you have ridden bike for a while think about improving suspension. Every standard bike setup is a compromise but if you start worrying about things it will undoubtedly spoil your enjoyment. I would be more inclined to spend any spare money on front fenda extenda and radiator guard, a hugger if you like the look, and good set of tyres also maybe an ABBA stand.
i fully agree with that.. but adjustment is free
Bibio is offline   Reply With Quote
Reply

Thread Tools

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
Rear suspension preload - help please. eren SV Talk, Tuning & Tweaking 15 28-05-09 11:05 AM
C Spanner - Rear Preload Adjustment jessie SV Talk, Tuning & Tweaking 17 10-08-07 09:59 PM
Sv1000s K4 Rear Preload - No C Spanner jessie SV Talk, Tuning & Tweaking 2 21-07-07 10:45 PM
Another question about rear spring preload. oldjack SV Talk, Tuning & Tweaking 2 25-07-06 08:09 AM
Softer suspension for lighter & disabled rider needed Alex Oliver SV Talk, Tuning & Tweaking 2 18-11-05 01:00 PM


All times are GMT. The time now is 06:56 AM.


Powered by vBulletin® - Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.