Ducati Monster Forum

I'm curious as what this involves.  Is it as simple as swapping the motors with new (or re-jetted) carbs?
Bike in question is a 2000 Monster 750.

Well make sure you get a carby 900 otherwise you'll have a bunch of problems.

Beyond that, I don't think it's much more than working out your fueling.  Never done it, but from what I've read it's pretty close to plug n play.

I am brand new here, but I think my Monster started out as a 750 and the guy told me it has a 900 motor in it. It looks like a plug and play thing from what he described it to be. I still need to verify if my Monster is a 900 motor because it doesn't seem as fast as my 900SS with 39 FCRs/Lighten Flywheel/Exhaust.  There is a MAJOR power difference when I rode both of mine so I'm skeptical about my Monster right now.

It could be you ended up with a small valved motor which would be less powerful than your SS.

Is the monster dry clutch?

Well, you've also got aftermarket fueling, exhaust and lighter flywheel- which can make a lot of difference. 

But like DP said - if it's got a dry clutch, then it's probably a 900.  If it's wet, then odds are it's still 750

You could measure exhaust pipes outer diameter.
900 is 40mm, 750 at least 3mm thinner.