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Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
Posts: 13,088
Join Date: Feb 2002
Location: Back in Essex
Mood: Passion Killer
The overbore 680 kit is a matching barrel and piston at 86 bore, Ducati pn 96401897C.
Cost is roughly 700-odd quid for parts at dealer prices (and then add labour on top to get it fitted...), but as Chris says this may well be discounted through the DesmoDue series.