What is your idle speed? set it to around a 1000 no more than 1100 max! Any more and the ignition advance will start to advance timing which can make rpms to rise on their own
500 than stalls! Rev it up and revs about 4,000. Tried turning the cruise control on handle, nothing, tried thumb screw on carbs that is suppose to adjust all carbs
I am just guess but it probably has restricted jets again if its been sitting for a year. I would say you will have to take it back to the shop that fixed it for you first time.