First, go through north Luxembourg + the Belgum Ardennes. Nothing compareable around. If you are interested in details for Lux, contact me.
In Ex Yugoslawia, my favorit amongst great countries is Montenegro: second most depest vallay of the world: Tara River + Durmitor National Park.
Serbia is better, than it´s image and Bosnia Herzegovina is absolutely great!
Stay away from the black sea´s shores of Rumania and Bulgaria. Great Countries, but not at the shore. Except the Donau Delta, which is worth a visit and a day´s trip on a boat, the rest of the shore is all-in-hotels and you will rarely see the black sea.
Bulgarias best spots are in the west: Belogradcik is a MUST. I also recommend the Iskar-Valley, Melnik and Kavacevica!
In Istanbul I can recommend hotel Resince (can be booked through hrs), which is located very central and has a police station 100 m away. Two globetrotter-motorcycles parked directly in front of the station, patrolled by policemen with utzis all night long. They even left their helmets and gloves on the bikes.
Contact me, if you are interested in first hand experiences about several rides to the balkan and Turkey. I live in Trier, Germany and would be happy, to have a couple of
s with you, if your route comes along.
A motorcycle-nomad´s job is a hard one, but somebody has to do it.