totally thick on electrics!

[nealblath]

just sorting out the wiring on my 74 Z1A but like a t**t I didn't label everything 8 years ago!

pretty much done but there is a little box slung under the battery compartment, regualtor or rectifier?, which has a cable with 4 wires and a green plug on which is obvious where it plugs in, but it also has a single black wire which I am not sure where it goes........help please!

[MCZ900]

I have the same wire wondering the same myself

[z2.john]

Black wire is the earth and needs to bolt direct to the engine (or frame)

[nealblath]

thanks John

[Bill Newman]

And on mine that black wire is fitted to the bolt that hold the seat lock ...

[nealblath]

thanks Bill

[CAT3]

If it's long enough it would be best connected direct to the battery -ve terminal. I'm sure later modified versions of the regulator had a separate black wire which was intended to connect direct to the battery instead of it being connected via the green plug to an earth.