If I'm not mistaken, most or all motorcycle batteries come with acid in a seperate container.
29.99 around here plus tax for the tender
Got my battery 89.00 they had one for 69.00
They are all maintenance free for our bikes
Don't bother with the origianl acid Busa battery. Get a sealed gel battery like on the Blackbird. Yuasa YTZ12S. It's a bit taller but fits, and lasts longer too.