2007-2009 Honda TRX300EX TRX300X service manual, Page 312Get this manual
BATTERYCHARGING SYSTEM CHARGING VOLTAGE INSPECTION Be sure the battery is in good condition before performing this testWarm up the engine to normal operating temperatureConnect the multimeter between the battery positive (+) and negative terminals
To prevent short, make absolutely certain which are the positive (+) and negative terminals or cables Do not disconnect the battery or any cable in the charging system without first switching off the ignition switchFailure to follow this precaution can damage the tester or electrical componentsConnect the tachometerWith the headlight on Hi beam, measure the voltage on the multimeter when the eng ine runs at 5,000 rpm
STANDARD: Measured BVMeasured CV15.5 BVBattery voltage (page 16-6) CVCharging voltage