No, early 916 and 748 came with 40mm mounted calipers.

It's the Ducati way - they changed sometime around 97/98, so there's a grey period when you could have had either!

Usually a good throughput of 65mm later forks on Ebay for around £150 a pair
if going to P4 calipers diferent brake hoses will be required because of the banjo fitting is on the side and no longer on the top

There are alternatives for the 40mm mounts such as Brembo Billet calipers, AP racings 4 pots and 6-pots, I have a set of 4-pots going on my 996, Dallas has the 6-pots on his 998R race bike and I have a set of PFM 6-pots on my 998Hybrid. There also a few other calipers out there that fit the 40mm mount, most of which when fitted with a decent mastercylinder and good quality pads will do a fantastic job of stopping you

I am with skids on this
I don't think it is worth changing you fork bottoms to 65mm
there are not enough good caliper options IMO
There are lots of different options for the 40mm as mentioned Billet items and so on.

The Brembo radial master cylinder is excellent,but there are alternatives.I have a Nissin radial from a ZX6RR.Found it to be equal to the Brembo,comes with a brake light switch and fits nicely,plus cost alot less.

aka.eric

Is this similar to the one you used? Nissin Master Cylinder

How easy was it to mount?

this is what you want for 40mm mounts

or you can do what i did before i got them:

Yes,same one.Fits a treat and having a brakelight switch built in,theres no big banjo bolt/switch to deal with,replace when it fails or leaks.
Paid £56 for a new one off ebay without a lever,which cost £32 from Kawasaki.The banjo bolt is a M10X1.25,not the same as Ducati,but there only a couple of quid.