A bunch, and they aren't cheap. Its a neat feature, but the fact that the method by which it does its thing changed it kind of a guilty plea.
I actually bought a replacement swing arm, that ended up being an R version, so I had some of the parts, but the others are quite expensive. I'm not Casey Stoner, so I think it would be lost on me.
8291B721AA LEFT HOLDER
77214151AA SCREW (x2)
8291B731AA RIGHT HOLDER
75610332AA OUTSIDE SPACER ECCENTRIC
75610301BA BUSH LEFT
77154459Z SCREW (x2)
70250451A BEARING (x2)
75610321AA INNER SPACER ECCENTRIC
75610312AA INNER SPACER ECCENTRIC
86050051A PIN (x2)
93050121A SEAL RING (x2)
70140171A BEARING, NEEDLE (Set)
71114641BA COLLAR, R. SWINGARM
71114631BA BUSH, LH
The last two mount in the screw holes on the engine and serve as step down for the smaller R swingarm bolts. Why they are labeled so differently...got to be an Italian thing.
Most of this is on page 134 of the 1199R parts manual. The short description of how it works is that instead of having large bolts which attach through the rearsets and bolt the arm to the engine, the R uses smaller bolts through an eccentric. The reason that the holders for the rearsets get replaced is that the R version has an extra locking screw, and the left is marked for the adjustment. To adjust it, you would slack the chain, loosen the rearsets, turn the larger head of the bolt on the left side and pivot the whole thing. Very small adjustments, its maybe 1/4" in any direction.
I am considering outfitting my base with the S model's electric suspension...