I remember an article writen by a Dutch guy who had travelled down the eastern route to CT on a Honda Fireblade. Quite adventuresome
I guess the northern connection between the border of Ethiopia and down into Kenya will be pretty rough, but south of that tarmac roads are plentifull.
Same as Bossies, I believe you can go just about anywhere on any bike. Thinking back, in the fifties the bikes had rather minimal suspension and still the people did surprising feats of travelling to far-away countries on terrible roads
Only when we pause to wonder
do we go beyond the limits of our little lives.