Howdy. The KZ440-A1 Ltd should be a 1980 model. 1979 might be the date of mfg which isn't necessarily the model year.
From the diagrams & cross-reference at Partzilla the 440-A1 uses the same speedo cable as a bunch of KZs & also the later ZR550s. The x-ref list may not be complete, so there could be more models that use the same cable.
CABLE,SPEEDOMETER 54001-1024
Kawasaki Motorcycle 1977 KZ1000 LTD - KZ1000-B1 CABLES ('79-'80 B3/B4)
Kawasaki Motorcycle 1978 KZ1000 LTD - KZ1000-B2 CABLES ('79-'80 B3/B4)
Kawasaki Motorcycle 1979 KZ1000 LTD - KZ1000-B3 CABLES ('79-'80 B3/B4)
Kawasaki Motorcycle 1979 KZ400-H1 Cables
Kawasaki Motorcycle 1980 Classic - KZ1000-G1 Cables
Kawasaki Motorcycle 1980 LTD - KZ1000-B4 CABLES ('79-'80 B3/B4)
Kawasaki Motorcycle 1980 LTD Belt - KZ440-D1 CABLES ('81-'83 D2/D3/D4/D5)
Kawasaki Motorcycle 1980 LTD - KZ440-A1 CABLES ('81-'83 A2/A3/A4)
Kawasaki Motorcycle 1980 LTD - KZ440-A1 CABLES ('80 A1)
Kawasaki Motorcycle 1980 LTD Belt - KZ440-D1 CABLES ('80 D1)
Kawasaki Motorcycle 1981 LTD - KZ440-A2 CABLES ('80 A1)
Kawasaki Motorcycle 1981 LTD - KZ440-A2 CABLES ('81-'83 A2/A3/A4)
Kawasaki Motorcycle 1981 LTD Belt - KZ440-D3 CABLES ('81-'83 D2/D3/D4/D5)
Kawasaki Motorcycle 1981 LTD Belt - KZ440-D2 CABLES ('80 D1)
Kawasaki Motorcycle 1981 LTD Belt - KZ440-D2 CABLES ('81-'83 D2/D3/D4/D5)
Kawasaki Motorcycle 1981 LTD Belt - KZ440-D3 CABLES ('80 D1)
Kawasaki Motorcycle 1982 LTD Belt - KZ440-D4 CABLES ('80 D1)
Kawasaki Motorcycle 1982 LTD Belt - KZ440-D4 CABLES ('81-'83 D2/D3/D4/D5)
Kawasaki Motorcycle 1982 LTD - KZ440-A3 CABLES ('81-'83 A2/A3/A4)
Kawasaki Motorcycle 1982 LTD - KZ440-A3 CABLES ('80 A1)
Kawasaki Motorcycle 1982 KZ440-G1 Cables
Kawasaki Motorcycle 1983 LTD Belt - KZ440-D5 CABLES ('80 D1)
Kawasaki Motorcycle 1983 LTD - KZ440-A4 CABLES ('81-'83 A2/A3/A4)
Kawasaki Motorcycle 1983 LTD Belt - KZ440-D5 CABLES ('81-'83 D2/D3/D4/D5)
Kawasaki Motorcycle 1983 LTD - KZ440-A4 CABLES ('80 A1)
Kawasaki Motorcycle 1990 Zephyr - ZR550-B1 CABLE
Kawasaki Motorcycle 1991 Zephyr - ZR550-B2 CABLE
Kawasaki Motorcycle 1992 Zephyr - ZR550-B3 CABLE
Kawasaki Motorcycle 1993 Zephyr - ZR550-B4 CABLE
