I've got a set of nc35 carb rubbers was about to fit them on an nc30 noticed they have different part numbers for cylinders 1 and 4 and 2 and 3 am i correct in thinking 1 and 4 are rear ?haynes manual says otherwise thought i'd ssk incase its wrong.

left front is 1 if I recall properly..

I would also reckon they'll work just lovely either way

On the RVF the rear cylinders are 1 (left) and 4 (right) and the front and rear pairs are different party numbers for some reason.

1 to 4 clockwise from left rear then. must compare the different part number for 2 and 3 and 1 and 4 there must be some slight difference in both pairs for some reason ?

1 and 3 front - 2 and 4 rear

They go across the crank - 1 is left front, 2 is left rear