Keihin 40mm "Butterfly"type Carburetor.
34 mm Mikuni CV Carbs Qty-4
If the engine that came with it is in it, it's a 1600cc dual-port engine with a 34mm Solex carburetor.
It was a 4 barrel Rochester ( Quadrajet ) Carburetor.
The 1998 xtz has a Teikei Y 26 PV carburetor. This is a dual carburetor where the smaller primary carburetor is of conventional type. The larger secondary carburetor is CV type.
2002
A keihin v571d5
The Day It Came to Earth - 1979 was released on: USA: September 1979
27mm
Rochester Quadrajet
That year did not use a carburetor. Those models came fuel injected.
July 1st, 1979
2 barrel