Probably can be done, but surely not that easy. The CS has a completely different swing arm, probably because belts can't have the chains' slack. So I guess it would be even more difficult with a Dakar's longer wheel travel.
About the teeth - it might have been better to take a torx wrench and count it myself, googling took a great deal of time
Well, the final ratio is 2.94:1, which is the same as the GS' default 16:47, and AFAIK the CS' gearbox has a 1 tooth taller 5th (data sheets say 2.75/1.75/1.31/1.05/0.84:1 instead of 2.75/1.75/1.31/1.05/0.88:1 in the GS/Dakar's case).