Is it possible that the poor running of the SR250 is not a fuel problem but an electrical one? I gave the bike a thorough inspection today and found the battery connection that vibrated loose last week and the week before had come loose again.Hence sometimes it runs OK and other times not . I changed the screws and made sure they were very tight.It runs fine now. Surely, after all this trouble, a simple thing like that couldn't be the problem could it? Tiz too good to be true.