Hi there gozell,,
I am in Ghana now, I did that trip that I was talking about. It was very well worth it, was excellent, as a matter of fact. In hindsight I rate this as among the best experiences I have had since starting my trip.
Basically I went south from Kedougou to Dindifelou, some very nice falls there to look at, then after that you pass thorugh the Senegalese border (exit) and take a very steep climb up a mountain, or actually not that steep, but very rocky and very difficult. I headed to Mali-ville, which is one of the highest points in Guinea. To get there is less than 100 km's from Kedougou, but will take you a day. The road is quite (very difficult if you are not too experienced in off road driving) difficult, depending on the weight and type of your bike. Mainly mountain passes and climbs, varying degrees of erosion and rocks in them. I didn't meet anyone the whole day and went through some very beautiful country and also some very different climatological zones. After that I went through Mali-ville, then onto Labe (lots of stuff to see, some very spectacular water falls etc.), then down to Mamou, then Kissidougou, then north to Kankan and then from there straight to Bougouni in Mali. Also nice stretch, quite remote too, no traffic and involves one river crossing by pirogue. The guys know what they are doing, so no great drama with the bike.
Do it and enjoy !!