ive just purchased a new (to me, obviously) 2001 vtr

any way it runs pretty well
but when i turn the bike off
and turn it back on the trip counter has reset itself to 0 and the clock is back to 0:00
i checked and replaced the dash fuse under the seat, but it was fine, and still has the same issue.
is it just a matter of checking the plug at the clocks and making sure im getting voltage at the red/black wire,
or do these have a back up battery or some other nonsensical thing
cheers