Honda TRX450ER Owner's Manual page 169

Battery (TRX450ER only)
The battery is located in a compartment under the left rear fender.
LEFT SIDE
(2)
(1) battery cover
Removal
1. Make sure the ignition switch is OFF (
2. Remove the battery cover ( ) by removing the screws ( ).
Servicing Your Honda
160
(1)
1
(2) screws
).
2