I had the opportunity to purchase a very clean used TW with less than 500 miles on it. obviously has been in storage for a number of years. It starts right up and idles smooth. However on acceleration it hesitates and sputters. I'm thinking probably a carb issue but any ideas would be appreciated. Unfortunately I do not have the history of how it was stored. Gas tank drained etc. I did try a tank of Seafoam to no avail. and verified the the Pilot Jet was turned out 2 to 2 1/2 turns.