I'm still having a bit of trouble with the fuel tap on the NC21. The diaphrams were previously glued, and a couple of removals of the tank to get to the carbs seems to have made the thing leak again.

Does anyone know if the fuel tap diaphrams for the NC30 are the same diameter as for the NC21? The parts are not available for the NC21, but if I can use a set from an NC30, I'll order them.

the taps are different but im not sure about the diaphrams inside im afraid.

best thing to do would be to measure the diaphrams you have in the tap and contact one of the sellers of the replacment kits for the size of what they are selling..