Can you please explain the difference between this Carburettor WT-227 and Carburettor WT-329 Assembly.

I have checked and we do a kit for both WT227 and WT329 which has everything in there. This would mean there is not much difference, please see the following link to the non genuine kit we have available: https://www.lsengineers.co.uk/n-g-carburettor-repair-kit-for-zama-c1q-s28-carbs-replaces-rb-66.html