Ducati 999 Tie Rod (What it's Used for!)

**treadwer** · 22 Jul 07, 07:35 AM

I need some help in locating a rear suspension tie rod for my 999 - preferably one with centre locking nuts/screws....

Ta!

XP · 22 Jul 07, 08:33 AM

Are you talking about something like this one.....??

XP

**treadwer** · 22 Jul 07, 07:00 PM

That will do fine........

XP · 22 Jul 07, 11:02 PM

I got that one off fleabay.......bargain price of £150.....

Its Titanium and seem to be a rare as rockin horse as I've only seen one other come up...

I have seen a few similar ones but most are from either Italy or the States....

You could try Harris Performance or similar as they might be able to put in touch with some who can......

JHP at Ducati Coventry maybe....

Telephone No 024 7633 5300

Just had a look throught my DP book......Part number 96843503B will buy you a pucka 749/999 'Titanium rear suspension con-rod linkage' basically a ride height adjuster......
Haven't got a clue how much but just quote that number to any Ducati dealer and they will tell you the good news...or not so good news where the wallets concerned.....

Hope this helps

XP

**hhhjesus** · 23 Jul 07, 06:48 AM

nice looking piece of kit, forgive the ignorance/naiveness/stupidity... but what is it used for?

**MarkST** · 23 Jul 07, 11:25 AM

Quote:

Originally Posted by hhhjesus

nice looking piece of kit, forgive the ignorance/naiveness/stupidity... but what is it used for?

As well as being a suspension component, it's a ride height adjuster - see the two threads each side of the central nut ? - one is left hand thread and one is right hand thread, so turning it one way raises the ride height and turning the other lowers the ride height.
There's one on your bike but that has a nut + locknut at each end and is therefore a little more fiddly to adjust.
Just have a quick look at your rear sussy linkage and you'll get the picture.

**legs748** · 23 Jul 07, 06:31 PM

Doesn't it also form a rising rate linkage?

**hhhjesus** · 24 Jul 07, 07:03 AM

Quote:

Originally Posted by Euromark

There's one on your bike but that has a nut + locknut at each end and is therefore a little more fiddly to adjust.

thanks 4 info :wink:

another embarrassing question

, why is the ride height adjusted? shorter/longer more twisty/more stable?

**hhhjesus** · 24 Jul 07, 07:04 AM

Quote:

Originally Posted by legs748

Doesn't it also form a rising rate linkage?

a what? lol and this does...?

**MarkST** · 24 Jul 07, 08:30 AM

Quote:

Originally Posted by hhhjesus

Quote:

Originally Posted by Euromark

There's one on your bike but that has a nut + locknut at each end and is therefore a little more fiddly to adjust.

thanks 4 info :wink:

another embarrassing question

, why is the ride height adjusted? shorter/longer more twisty/more stable?

If you raise the ride height, you're in effect, reducing the rake (making the fork angle steeper) this in turn will sharpen steering and make it more flickable (trade off is less straight line high speed stability - this is where your tank slappers and steering dampers come into the picture) so obviously then reducing ride height will increase the rake, making the steering slower but will give more straight line high speed stability.
However, stability will be much less of an issue for normal(ish) road riding than balls out riding on a race track, particularly one with long top speed straights.
The folks over in DesmoDue can probably give a more detailed explanation of this, as I would imagine them to alter suspension geometry to suit whichever track they are riding at the time.
Then you've got fork offset and trail..........
Hope this helps.
Mark.

**MarkST** · 24 Jul 07, 08:34 AM

Quote:

Originally Posted by hhhjesus

Quote:

Originally Posted by legs748

Doesn't it also form a rising rate linkage?

a what? lol and this does...?

Compresses the shock in an increasingly progressive manner. (ie first cm of swingarm upward movement compresses shock 1cm, next cm of swingarm upward movement compresses shock a further 2cm, so further swing arm goes up, the stiffer the action becomes) Hope this helps.
Mark.

**legs748** · 24 Jul 07, 08:38 AM

Quote:

Originally Posted by hhhjesus

Quote:

Originally Posted by legs748

Doesn't it also form a rising rate linkage?

a what? lol and this does...?

A rising rate linkage compresses the shock to a greater degree as the swingarm moves, in effect making the suspension seem stiffer the further the swingarm travels up. If you notice the rocker on top of the shock is longer on one side of the pivot than the other.

**legs748** · 24 Jul 07, 08:39 AM

Beat me to it Mark!

**Dan** · 24 Jul 07, 09:06 AM

Great thread this one.... thanks for the techy education fellas!

**MarkST** · 24 Jul 07, 09:17 AM

I'm still struggling with front end adjustments though, dont really seem to do much - must change my fork oil soon - been putting this off as i've never done it before and it seems like a bit of a palaver.