i have flhtcui harley davidson 1998 evolution motor,no trouble lights on ,but when i start the bike it will only run for a bit and shut off when cold,if i hold till warmed up the throttle it starts to hiccup back tho the carb,changed fuel filter,body intake orings,pulled timing cover checked timing?

 

FLHTCUI is an EFI bike. First thing you need to do is figure out if you have EFI or carb. If it's EFI, check for trouble codes. If carb, I bet you have an intake leak at those O rings.