If you're interested in great roads to ride here's a little taste of Transfagarasan road in Romania, the one referred to as the best in the world by Jeremy Clarkson at Top Gear:
Transalpina is another reccomendation - the newest highest mountain road in Romania. Pictures enclosed.
You can fly to Cluj, rent a motorbike in Turda and be on your way. You can find deals on motorbike rental here: http://www.motorcycle-tours.travel/bmw-motorcycle-rental-europe.html