Proper adjusting the rear suspension on my 1998 Monster Dark

[BG DUKE]

Hello everybody 
That's my first post in the DMF, and unfortunately it's in Tech category.
It's about the rear suspension adjustment of my 1998 Monster Dark. 
First let me show you the little black monster:

As you can see the rear suspension is adjusted realy low, from the previous owner.
Now the main suspension parameters on my bike are:
- distance between the mounting holes of the rear shock absorber without the rider: 300mm
- spring height without the rider: 145mm
- the ball joints are fully screwed in the connection bow (I know there must have a few windings unscrewed)
Tomorrow I'll mesure the seat height, but it's very low.
I have some doubts about the shosk absorber. It's a Sachs one, but I think it can be from other Duke model.
To start adjusting the rear suspension sag and preload first I need to change these parameters to the standart values.
There are not much Dukes around, so can someone with an older monster (with a connection bow on the rear suspension) mesure these parameters and post them here. Any other advices are wellcome too 

Regards,
Christo

[BG DUKE]

This morning I went to the garage to mesure the seat height.
It's 730mm 
That means it is 40mm lower than the standard height of 770mm.

[wiggy_nz]

Go to http://www.ducatisuite.com/rearsuspension.html and this will help sort out your ride height etc etc.  Screw in the dampening screw at the bottom of the shock all the way, then out 6 clicks and try that. 

[BG DUKE]

Thanks @wiggy 
I allready knew about this site and even had printed the instructions about the rear suspension adjustment.
They lill be my guiding light when I start the adjustment.
But first I need to start from somewhere. And this somewhere is the basic rear suspension adjustment.
This is why i need to know the following parameters:
- the distance between the axes of the mounting holes of the rear shock absorber;
- the spring height;
- how much windings of the ball joints have to be unscrewed.
When I unscrew the ball joints there will be more tension on the shock absorber, and I will have to change the spring lenght to compensate it. It's not so complicate, but I don't want to start doing this adjustment on blind.
That's why I need help from somebody, who have the bike like mine, to measure and post them here.
Thanks in adcvance 

[BG DUKE]

Come on boys 
I need some MONSTER ASSISTANCE
The bike must be on the road this weekend, for a trip.

[desmo_dude]

I think this other article from the same site has some of the information you're looking for:
http://www.ducatisuite.com/rearheight.html

[BG DUKE]

Many thanks @desmo_dude 
I missed this very useful indormation  but I'll try to readjust it again, because the seat height was rised only a half inch.