| Frank,
The origional mk.1 Superlight had a lower seat pad made out of a kind of foam rubber.Ducati only fitted these on the first run of bikes.They outer coating soon split or wore away and they let in water.Ducati fitted a upholstered seat to later models.
Being verticaly challenged,my wife had a cut down seat on her 900SS.A friend that made leather furniture did it for her.The seat was recovered in leather with red piping and an Italian flag,just like the Corbin,for 20quid.
I rode the bike many times myself and found the riding position very comfortable. | 
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