Can anyone help I've got a 1.4 and I was wondering if there is any other carb that will fit on it bigger carb so get bit more power .

In all honesty, the one thing the 1400 has going for it is fuel economy, putting a bigger carb on it would take away its economy, plus you wouldnt get any more power (well nothing considerable) so you'd have a slow engine drinking pertrol. Your best bet is to find a 1700 and sling that in, or better, a valver Thomas............