newbie question about clock

[jools]

Hi all just a quick question.
started bike today after i pick it up from the dealers.
and i reset the clock to the right time.
for the first time.
but by the time i drove home and had  a cup of tea and moved the bike
into the garage the clocks reset themselves  back to 1:00am.
is something really busted or do i need to reset something or look for something
bike is a Gen 1 fazer 1000 04 plate.

jools