kotmfu

I dont know wether this problem is common or solveable, but i thought i should ask.
i recently got my nl fairlane and ever since then it takes me nearly 25 minutes to fill it up, becase i have to hold it at a very slow speed or it clicks and subsequently turns off.
ive had a look and it seems that the fuel doesnt get from the initial intake pipe thing (jargon is great) into the fuel tank fast enough and it backs up and hits the nozzle (which makes it close).
does anyone know of a way to fix this? i'm willing to try almost anything because its really annoying.. i could fill up my 80l zl fairlane in half the time it takes to fill up this 62l tank.. it makes no sense!
thanks all in advance