stuttering fzs 600

[red98]

hi matey.......yes been thinking about the headers    it is a big stutter :\  and i think to big for the headers alone to cause it....ive welded the origanals up and can refit to see  ....thanks for the offer of the loan ,i`ll bypass both the pump and filter at the weekend and see what happens......as for the jets ,this is what the dealer in leicester was getting at....there is no reason to change them,its worked on ades but we dont know why :\ ....mines standard,as you know,with exception of stainless headers and k+n filter,which should not need a re-jet  :\ ......once again thanks for your input