Choosing a bike for traveling DR Congo

[lefranck]

This is my first thread.

I'm having a hard time choosing a bike for my stay i DR Congo.
The roads in the northern part of the country has quite bad standards. In other words there are no roads in some areas, just tracks.
The rain season is between April and November and the roads/tracks gets indeed muddy.
I'm looking for a bike that can suit me well in these conditions.
Its no option for me trying to buy a bike in Kinshasa. I'm looking for one in Germany and then import into to Congo.

The bikes weight is important. Crossing rivers is done by canoes and the timber bridges is often in poor conditions.

I will have to carry all of my luggage on the bike.
The distances I will have to travel is between 100 to 500 km on gravel/muddy roads.

My question is what kind of bike/mark/model is most suitable for me.

I have been looking for a Suzuki DR350. Is this a good choice? If not, what chould I go for?

I really need help.