BMW F 650 1996

Bought bike 6 months ago drove once put in dry shed.went to get it ready for summer would not start Proceeded with a new battery new Regulator,full carb rebuild,bike now starts idles for about 10 mins then starts running rough and then cuts out,I do not have any time to go through further hence bike is for sale,it is in good condition,new metzeler touring tyres,full pannier set 3 box's all keys there,manual,receipts for work done May suit some one who has worked on these before and has come across this our competent bike man Am selling for 1200 no offers 31k on the bike