If The Battery Is Low (Or Dead) - Honda TRX420TM Owner's Manual

If the Battery Is Low (or Dead)

Jump starting is not recommended, especially if you use an automobile
battery. The greater amperage of an automobile battery when the car
engine is running can damage your ATV's electrical system.
Bump starting is also not recommended.
If you can't charge the battery or it appears unable to hold a charge,
contact your Honda dealer.
Taking Care of the Unexpected
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