Correct me if I am wrong, but I don't see much on fuel cleaning additives. Do they work? Can they damage the bike? How often and how much? Are some better than others? Who has used them and do you feel it worked? I checked online and did not see specific answers. I have been using seafoam (my bike has been running fine) and my riding buddy just started experiencing engine hesitation with fuel injectors and said he never used any additives at 40,000 miles. He doesn't want to take the fuel system apart. What say you!