recently ive been brimming the bike when ive filed it up, some times going over the rim a little and because i usualy fillup in the dark on the way to work or from work i hadent relised around the outside of the rim of the spout there is loads of fine girt/dirt and when ive over filled it its gone over the spout onto this stuff then taken some of it through the over fill hole into the tank (i think)
not sure how good the internal tank filter is or how accesable it is or intercangagble
was wondering if these are any good?

http://www.sportsbikeshop.co.uk/motorcy ... od/79/2659
would it slow down fuel flow to the carbs if one if placed in the fule line?
cheers guys.