fuel filter
 

how do you go about changing this
i know its in the petrol tank thats about it.

Take the tank off, turn it upside down then undo the bolts holding the metal plate. This should pull out complete with the pump etc. You will see the filter. Dont forget to replace the big o ring around the hole when you put it all back together. I think there is some special stuff you can use on it as well.

sorted;)