Welcome to KZr Sedodes.
I'd recommend obtaining either a Clymers shop manual, or Kawi manual (actually the Kawi manual is two. The 1st covers similarities in the KZ750, and the supplement covers the ZN model-specific items).
My first question would be what leads you to believe that the starter clutch is bad?
Is this what the current owner of the bike stated is wrong?
What are the symptoms or known problem(s) with the starting system?
I don't want to guess, but if it's slow to crank it could be as simple as a loose connection/corroded battery cable, or just a worn out battery.
FWIW, the starter clutch can be accessed and removed by first removing the exhaust pipes and then the oil pan. And it's not always necessary to replace the starter clutch assy (unless it's trashed of course), as there are rebuild kits available = $$$ saved!
Like steell stated, the basic engine design is loosely based on the KZ650/KZ750's, and a good portion of mechanical info related to them will apply to the ZN700 as well.
I have these threads bookmarked in my profile on the now archived site:
Starter clutch fix
Oil pump refitting
They should give you a good idea of what a starter clutch rebuild entails. Credit goes to OnkelB for his posting of the repair procedure and part list.
As far as your other questions go:
1) Kawi only made this particular model of ZN in '84 and '85 (they also made a ZN750, ZN1100, and the water-cooled ZN1300 6-cylinder touring model), and quite a few parts are model specific to this bike only. It doesn't mean that parts from another model Kawi
won't fit, it just means that they may not be a direct fit and will require a little fabricating to fit/function correctly.
2) Refer to starter clutch rebuild info already given.
3) The starter clutch repair (if actually needed) will set you back a mere $30 for the kit (NEW copper exhaust gaskets will also be needed) and what ever time you invest in doing the repair.
Basically most of us rate an older KZ or similar bikes value at about $1 per CC of engine size. Obviously the overall condition of the bike will vary this (worn tires/brakes, faded paint/damaged body work, etc), and give you leverage to bargain the asking price down a little lower.
I just finished restoring my '84 ZN700, and am totally happy in how it rides and looks!
Pics of my restored ZN700
Post edited by: RetroRiceRocketRider, at: 2006/03/25 13:08