2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 248Get this manual
BATTERY ICHARGING SYSTEM
BATTERY
REMOVALIINSTALLA T10N
Remove the seat (page 2-3)With the ignition switch OFF, disconnect the negative {-} cable firstthen disconnect the positive (+) cable by removing each terminal boltUnhook the battery holder band and remove the battery from the battery boxAfter installing the battery, coat the terminals with and then rhe nega- clean greaserive 1-1 cableConnect the posilive (+ cable firs t
Install the battery in the reverse order of removal
VOLTAGE INSPECTION
Measure the battery voltage using commercially-available digital multimeterVOLTAGE (20C68F): Fully charged: 13.013.2 Under charged: Below 12.3 V