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Old 02-Feb-2009, 00:36
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Ducati Meccanica
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Some Info Kindly supplied By Skidlids (Kev Ellis):

Some info for those starting out in Desmo Due
I'll try and add to this over time



Class B 583cc bikes

Gearing
--------
Renthal Rear Sprocket part No. 236 -520 -No. of Teeth
eg 236-520-43


Very early engines with 2.28 to 1 primary ratio

Rear sprockets 39 - 38 - 37
Front 15
Chain either 96 or 98 link

Most common 583 engine (most SS models from 1995 on)
with the 2 to 1 primary ratio

rear Sprockets 43 - 42 - 41
Front 15
Chain 98 link


Last of the 583 engines as found in late monsters
Clutch slave on the left with a 1.85 to 1 primary ratio
Not fully upto speed on this one yet but would be looking at

Rears 48 - 47 - 46
Fronts 15 -14
Chain 100 links


Fork springs
------------

Early Marzocchis (40mm caliper mount)
I have used Ohlins springs
08805-01
VTR1000 Firestorm = 0.85kg/mm

alternative for the lighter rider
80029
8634-80
CBR600FV/FW = 0.8kg/mm

In the later Marzocchi forks (65mm caliper mount)
I have used Ohlins springs for a 748/916
08627-90
Air Gap 110mm to 120mm (the nearer to 110mm the better)
When adjusting the air gap 6.25cc of Oil = 5mm of Air Gap
Fork leg tie wrap to be approx 5 mm to 10 mm off the bottom of the fork leg
(thanks to Chris P for the air gap & volume info)

Speedo drive replacement spacer
-------------------------------

Early Marzocchis with 20mm spindle, made mine with a step in it
ID = 20mm clearance
OD at fork end = 35mm
OD at wheel bearing end = 33mm
Width = 35mm

Later forks with 25mm spindle (will try and add this info later)

ID = 25mm Clearance
OD at fork end = 32mm minimum, mine is 35mm
OD at wheel end = 32mm
Width = 30mm




Cambelts
---------

Early 583s with Square tooth belt
part No. 066029090

Last of the 583s with round tooth belt
part No. 73710051A

Gaskets
-----------

583
Exhaust Gasket - 037084005
Base Gasket - 78610471A
Rocker Cover Gasket - 78810322A

************************************************** *********************

Some more info from Chris P.

Quote:
Originally Posted by Chris P.
To add to Skids info on these forks.

Air Gap 110mm to 120mm (the nearer to 110mm the better)

When adjusting the air gap 6.25cc of Oil = 5mm of Air Gap

Fork leg tie wrap to be approx 5 mm to 10 mm off the bottom of the fork leg


(do not forget to use a smaller spacer above the springs to give you the correct static sag, as the 748 springs are longer than the standard Showa's.)

Will give a more detailed suspension settings over the weekend ( if thats ok with skids )


Chris

More....................

Quote:
Originally Posted by Imola Duke
Hi
If i changed my standard spring on my 750ssie showa shock
to a single rate spring what approx weight spring would you
advise me to use and what spring manufacture ?
If i did this would the damping & rebound be ok ?
Thanks in advance for help

Quote:
Originally Posted by Skidlids
Steve the damping should be OK as it has quite a wide range to deal with being built for a road bike that may or may not require the carrying of a passenger.
Spring rate will depend partly on your weight with riding gearing on.
I go to Race Parts for my springs as I get a good deal but have to wait for them to order in as they only stock balanced pairs for the car racers. Otherwise try K-tech or JHP

Quote:
Originally Posted by Imola Duke
Thanks Kev
I'll get me leathers on etc and weigh myself pre Xmas
Btw... I have made a simple but affective ride height adjuster to
use with the ie shock. (I'll post up a pic when it's fitted)
I did plan on buying a new shock but this credit C has hit work hard
so i'll make best use of what i have for next year!

Will the shock supplier need to know the bike weight etc?
Sorry if i appear dumb..lol

Quote:
Originally Posted by Skidlids
Steve a single rate spring between 7.5kg/mm to 8.5kg/mm will probably get you close

Fork springs want to be around 0.9kg/mm


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Last edited by webteam : 02-Feb-2009 at 00:44.
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