What did, you haven't actually detailed any real issue. Could just be a flat battery from the info we have. As to the mechanics discription of 'some fuel parts', meaningless.
Let us have a clear non objective discription of what the bike is doing, any odd noises, smells, have the plugs out for new ones (always worthwhile when you are having problems) but keep the old and tell us what they are like they may be usefull to prove the new ones too,is there any black deposits, white deposits, nice tan colour.
The bike will probably be telling you whats wrong we just need to listen properly.
Welcome to the forum by the way.