This pair of carburettors are a replcment for the following carburettor part numbers:-
FZX1122 - 1978 & most of 1979 - With raised damper piston cap - LZX1313 moulded into piston cap, and have Waxstat jets
FZX1327 - very last of 1979 - With raised damper piston cap - LZX1506 moulded into piston cap, and have Waxstat jets
