Recently acquired 1150 has a Motobatt fitted and if the bike is not left on the Optimate it starts but voltage is low and it resets the clock, good sign of a failing battery which according to a receipt with the bike is barely 2 years old.
Not the first Motobatt I have had that did not last , looks like a hew battery is on the cards in the near future
I just the oem spec Exide 19aH ones
Seem to be fine