hey guys

Im having a bit of trouble with me ef. runs and drives ok when cold but when it gets up to operating temperature i lose all power, it strugles to get past 40 kmph. Just to shorten the list i have recently replaced the coil the fuel pump and filter air filter and spark plugs. Had some power issues recently that the fuel filter fixed but i pulled it off last night and tried blowing through it and it seems to be holding build up again so im going to remove the tank and clean it on the weekend but i dont understand why im only having the problem when the engine heats up? it has plenty of go when cold.
any ideas would be great thanks

done leads?