ma is milliamps
have you stuck it in the bike and tried it?
you probably dont need to charge it. the chemical reactions between the acid you put in and the lead of the plates makes the battery work. you may need to charge it in a few years when it is worn to kinda re-activate this reaction
'11 Honda Hornet '03 Gilera Stalker '03 MBK Stunt
'81 Honda NC50 Express '82 Puch Maxi S '70 Puch Maxi N