The same thing happened to my 98 RSTD after just a few weeks of sitting,after running just fine. I removed my carbs and took them to an independant shop locally owned by a friend,he disassembled and cleaned them for $60.00 each.I had 2 pilot jets totally blocked,he used a wire drill bit in his fingers to gently clear them.I drained my tank and fuel pump but all looked clean... In talking to the shop, they had many carbs and bikes waiting to have their carbs cleaned. It definately is ethanol fuel related.My bike has never run better.Thanks to this great post,we can hopefully prevent this from happening again.I am a firm believer in seafoam and fuel stabilizers now.
Also we figured that multi carb engines like ours are more prone to clogging due to the smaller jet sizes.My Vulcan 1500 didn't have these issues maybe because 1 carb,larger jets?
Anyway,this is my 1st post,just want to say thanks to all for helping me wake up a neglected 98 RSTD,my 1st after owning a pair of 1500 Vulcans and a few Harleys along the way..Oh and I love the RSTD and the RK pipes are going on this weekend!!