Yamaha DT501988 Owner's Manual page 87

9. Remove the battery and charge it. Store
it in a dry place and recharge it once a
month. Do not store the battery in an
excessively warm or cold place (less than
O' C (30' F) or more than 30' C (90' F)).
U-058
NOTE:~~~~~~~~~~~~
Make any necessary repairs before storing the
motorcycle.
8-3