interesting as I’ve just bought a speed triple that comes with Stylema’s and a ratio adjustable MC from the factory, the ratios are 19/20/21 so I’d be surprised if 17mm was optimal
Are you sure that’s not lever offset/ratio rather than piston size (never heard of variable piston m/cylinder).
On a Ducati with MCS (as fitted to the SP2), the 19-21 only refers to the distance the shaft is from the pivot. It doesn't refer to the piston size. And, I believe the piston size is 17
