Originally Posted by Derek
I'm very surprised at that! The seal is part no. 93781.1824 and is fitted to the current S4RS, S2R, MS1100 and HP1100 models.
Seal, Part No. 930.4.011.1A, is fitted to the 748/749/9XX and 1098 range. I don't think the inside and outside diameters are different but the depth might be.
In any event it shouldn't be difficult to get a replacement seal. Measure the OD, the ID and the depth and go to any bearing stockist. They shouldn't cost more than a pound or two.
I have now had a response form my dealer who says that the part number is the same for all the bikes but that Ducati have ceased supplying these seals so I will have to contact the bearing suppliers tomorrow and hopefully get them there.
"The Grey Assassin" - 2005 ST4s
Goldvalves , Re-sprung rear Ohlins , Tapered headrace bearings , Galfer Front Discs , Open airbox with K&N filter , Iridium NGK's with Magnecor Leads , 15/42T Cogs , Helibars with Oxford heated grips , HID Lights , CRG 'Stubby' Levers , Zero Gravity DB Dark Screen , Twin-Tone Fiamm Horns plus a bunch of 'detailing' modifications.