2003 Kawasaki KLF250 Service Manual., Page 255Get this manual
ELECTRICAL SYSTEM 16-13 Battery
Initial Charging
WARNING
Keep the battery away from sparks and open flames during charging, since the battery gives off an explosive gas mixture of hydrogen and oxygenWhen using battery charger, connect the battery to the charger before turning on the chargerThis procedure prevents sparks at the battery terminals which could ignite any battery gaseson the Fill each cell to the upper level line 1.270) battery case with fresh electrolyte (specific gravity: at temperature of 30C (86F) or lessLet the battery stand for about 30 minutes before charging
If the electrolyte level drops, add electrolyte to the upper level line before chargingcharging rate at the battery Set the it for 10 hours110 example, if capacity, and charge For the battery is rated at 14 Ah, 11 Ah (U.Smodel), the charging rate would be 1.4 Ah, 1.1 Ah (U.Smodel)