NO, it will not fit. 100% sure. The one shown above on the Skorpion is
NOT the same model. Look closely at what you are doing, don't just glance.
Apparently I was not very clear, even tho I posted many links along with the correct model number. Sometimes I get the idea I must be writing some foreign language nobody understands.
That one is, BTW, not a caliper from an Aprilia RS250. That is the later model with 65mm center-center fastening.
Compare the two:
It is easy to see the difference in photos because the caliper that fits has only a single pad retaining pin just like the Grimeca; the other has two.
The one you need, shown left, with 40mm fastening uses exactly the same pads as the Grimeca shit(bad copies as I said); the other uses completely different pads which are longer as well.
There are adapters to mount a 65mm fitting to a 40mm layout - and vice versa as well. Don't bother with that later model, tho, it is not as good as the one that fits because it is too long and is thus too flexible. The proper one can be improved, made stiff enough even for racing with the usual easy trick:
The pin is replaced with a suitable M6 bolt for which threading is cut in the back half of the caliper. The bolt is only firmly laid on, not actually tightened and secured with a lock nut. This keeps the caliper from widening and returns a better, crisper feel. Such treatment is obviously not possible with the later caliper.
This later model abounds in eBay bacause it is routinely replaced with the present model:
This model has two separate smaller pads but more important, it has the fixed bridge across the center; it is the same technically as the radial caliper:
and it is relatively rare at eBay because there is no need to replace it.
There are after-market calipers with the 40mm fastening, center bridge and individual pads from ABM, PVM, Discacciati. These are all billet calipers and are expensive. I personally use the ABM, both billet caliper and billet radial pump, which I also sell.
http://www.ab-m.de/en/products/brake-technology/brake-calipers
But I really only use it - it is very good! - because I sell them. You do not
need anything like this or the 6 piston Harrison being discussed in another thread.
You don't need a 6 pot caliper at all. ever. Maybe in something as heavy as a truck - or a Harley...
) 99 Skorpion Sport cup and it has had the front end dismantled and parts errr hardware was lost. After looking around from the better part of a month and a half i have tracked down a new front brake disk/rotor and now that i have that i can reassemble the front end but to my surprise i have no caliper bolts ( the 2 that hold it to the fork) nor can i seem to locate the original brake line Banjo fitting. Can someone give me a lead on where i can get these parts so i can check this 1/2 of the bike off in my rebuilding process 
didnt notice the difference in mounting holes!!
