Front end Static sag - Ducati.ms

Karlr · Aug 30th, 2009, 10:13 am

Hi Chaps

any idea what you guys are running for static sag on the Hypermotard s with the black marzochis..

I'm running 30mm at the moment but feel it's a bit hard so am about to loosen off.

Don't tell me about rider sag or weight or oil or conversions ta...just the base line static sag.

Ta Karl

AXE · Aug 30th, 2009, 5:38 pm

I think you will find 40-45 mm to be more to your liking. This front end is like long travel on a dirt bike and sag is definitely more than typical for road bike. Search some threads, I posted my settings and they work pretty well. I don't recall all the numbers off hand.

Out!

PedroHM · Aug 30th, 2009, 5:55 pm

It's hard as the back has normal travel numbers. I got the back sag set right then just balanced the front to get the turn in and Mid corner balance right.

remery · Aug 30th, 2009, 9:03 pm

I've now put 8 turns from factory on the front and my sag is now 47 (I'm 100kg). Previously the sag was 57 felt horrible and bottomed out on on monos. I really like it now but that could just be because I'm getting used to the bike. I loosened the compression 1 turn to try and remove some of the harshness if that makes sense.

BrianG · Aug 30th, 2009, 11:18 pm

What is "static" sag?

There are 2 sag numbers and they seem to have a variety of names. One is with the rider off (unloaded) and one with the rider on (loaded)

For a plusher street ride the following should get you close. Do NOT mistake this for a track setting!

Find out your total fork travel, and try setting loaded sag at 1/3 of total. If your springs are right, unloaded sag should be about 1/2 of that.....

Then back off your compression damping to 1/2 of the recommended setting. If that's too bouncy, add 2 clicks at a time until you get where you want it.

AXE · Aug 31st, 2009, 12:09 am

8 turns in from factory seems high. I think I went four at one point and went back to 2 turns in or something like that. I suppose it all depends upon how much you weigh, etc. Everyone is going to be different.

Out!

Karlr · Aug 31st, 2009, 4:23 am

is never easy

that's why I asked about static...(unloaded) sag. The weight differential of different riders makes settings personal I know... :-)

if we could set up a database of static sag plus rider weight then we'd have a variety of settings to try for easy set up...of at least preload no?

Although the rest is personal taste...road type tyres etc etc etc...

Just a thought...thanks for the responses .didn't i read somewhere that fork travel is 165 mm in total.

848racer · Aug 31st, 2009, 9:57 am

Sag, both bike (static, no rider on bike) and rider (dynamic, rider on bike), is just to get you in the ballpark on springs, change it till it feels right. Just because sag is "correct" doesn't mean the bike will handle like you want it to.

BrianG · Aug 31st, 2009, 11:59 am

Quote:

Originally Posted by 848racer

Sag, both bike (static, no rider on bike) and rider (dynamic, rider on bike), is just to get you in the ballpark on springs, change it till it feels right. Just because sag is "correct" doesn't mean the bike will handle like you want it to.

Quite true, but on the other hand, I find that if you don't start with the 15% unloaded / 30% loaded ratio (or something close) baseline, all of the other "settings" seem pretty fruitless.

It's kind of like doing a tuneup without starting with setting the valve clearances first....

Just my personal experience....

PedroHM · Aug 31st, 2009, 6:47 pm

real sag is imposible to set unless you know the relaxed preload of the top out spring. there is a good docco on the racetech website explaining it. the topout spring makes the cartridge longer so its hard to know unless you know the real measurements.