Is the swing arm pivot bolt on a S4R the same size as other Monsters with loop swing arms. I think that maybe it is the same diameter but just a little longer. Anyone know?
The pivot shaft is unique to the S*R series
http://ducatimonsterforum.org/index.php?topic=13421.0 (http://ducatimonsterforum.org/index.php?topic=13421.0)
I think they are all 20mm, but vary a little in length.