Maybe just swapping the final drive for a Zg1200 will accomplish the same?
The Rear Drive Gear PN: 42034-0002 is the same for ZG1000, ZG1200, ZG1400, and even some KZ shafty models back into the 80's, so I would think the answer to your question is no.
-------------------------------------------------------------------------------------
See:
https://forum.concours.org/index.php?threads/zg1000-and-zg1400-share-same-rear-wheel-coupling.53241/Part No's:
42034-1011
42034-0002 superceded 42034-1011
42034-0754 2020-2021 ZG1400 (same part? I did not find any reference to this superceding a prior part no. but have been told by a C14 owner who owns C10 and C14 that they are the same)
List by Models:
1979-1980 KZ1000 Shaft
1983-1985 KZ1100 LTD, ZN1100 LTD, KZ1100 Spectre
1983-1986 Voyager ZG1300
1985 KN1100
1985-1986 Eliminator
1986-2003 Voyager ZG1200
1986-2006 Concours 10 - ZG1000
1987-2008 Kawasaki Vulcan VN1500 - 88 - Classic - Mean Streak - Nomad - Drifter
2008-2019 Concours 14 - ZG1400
2020-2021 Concours 14 - ZG1400 (as part no: 42034-0754)
-------------------------------------------------------------------------------------