Fazer troubles

[sinto607276]

My fazer is running like a bag of you no what. Bought it off someone who said it was due to the cracked inlet manifold rubbers. Have replaced but still crap.in fact its running worse now. Its very hesitant on take off.  Any ideas on the problem?

Welcome on board but we need more info on your bike to try and help you.
ie, type of fazer, year, etc and pictures would help too.