diameters

Can anyone tell me what the standard diameter size is for the master cylinders? Gonna fit the Ohlins to the Mille but need a set of clip-ons for 'em but not sure what size bars I need to get.

Was sitting thinking about radial calipers and how to get them onto a Tuono... I thought Hmmmmm Superduke... they're 54mm at top and 60mm bottom. What's the Tuoldo ? The easy answer is of course, Ohlins... but DAMN they're not cheap.

Can someone who knows please confirm that an 07 Mille R should have 51mm forks? My mate's got a lovely set of Gilles Variobars that he got for his 07 2No but didn't use. I was going to buy them but my 01 Showas are 53mm. We didn't get to measure the bar clamps but it didn't seem that they would...