Yamaha YFM250XR Manuel Du Propriétaire page 328

5. When the machine is not to be used for a
month or longer, remove the battery and
store it in a cool, dark place. Completely re-
charge the battery before reusing.
6. If the battery is to be stored for a longer peri-
od than the above, check the specific gravity
at least once a month and recharge the bat-
tery when it is too low.
7. Always make sure the connections are cor-
rect when putting the battery back in the ma-
chine. Make sure the breather hose is
properly connected and is not damaged or
obstructed.
8-75