The digital clock in the '86-on won't kill a battery quickly. Never had an issue
in the past.
I do have the issue with my Ducati (analog clock) if I forget to disconnect the
battery after a ride and not ride again for a month or so, the battery is dead.

On Sun, 9 May 2021 08:16:26 -0400, Geoffrey Toye <geoffreytoye@GMAIL.COM> wrote:

>Karl,
>
>The first winter after I bought my '81 westy I was having trouble keeping
>the main battery charged when the van was not being used.  I disconnected
>the battery and found that the parasitic draw was from the clock. The draw
>was enough to completely drain the battery in four weeks.  So now I keep a
>battery maintainer on it in the winter.
>