The Kawasaki KLR650 uses a conventional battery (not maintenance free) that is vented to the atmosphere. The battery size is 12N14L-A2 or YB14L-A2, depending upon brand. This is a 12 volt, 14 amp/hour (a/h) battery.
SAFETY FIRST: Protective gloves and eyewear are recommended at this point.
Caution: Batteries contain sulfuric acid, which is highly corrosive and can cause damage or injury. Use baking soda to neutralize any acid spills.
Removal
Remove the seat. See the Seat topic for more information.
Remove the left side cover. See the Side Covers topic for more information.
Remove the Phillips head screw that secures the battery cover plate.
Remove the negative battery cable first using a 10 mm wrench. Disconnect the vent hose and leave it in place.
Pull up the red rubber cover and remove the positive battery terminal using a 10 mm wrench.
Pull the battery out the left side and inspect it for damage.
Inspection and Servicing
The battery acid level should be between the two lines. If the fluid level is low, as in the photo, add distilled water. Do not use tap water as it contains minerals that could damage the battery.
Remove the battery caps using a flat blade screw driver.
Using distilled water, fill the battery up to the upper level line. Replace the filler caps, being careful not to over tighten them.
Charging the Battery
When charging the battery hydrogen gas is released from the electrolyte (this is called “free gassing”). Make sure there are no open flames or sparks near the battery when charging – the area should be well ventilated.
If the battery is weak and needs to be charged remove it from the vehicle.
Use a 2 amp or less trickle charger (preferably one of the “smart chargers” such as the Battery Tender or Yuasa Automatic motorcycle battery chargers). How long to charge the battery depends upon how low its voltage is, but it will probably take several hours. One of the advantages of the smart chargers is that they turn themselves off automatically when the battery reaches a full charge, eliminating the possibility of overcharging the battery. After the battery has been charged let it sit for thirty minutes before rechecking the voltage. A fully charged 12 volt battery should hold at least 12.6 volts.
Installation
Install the battery in the reverse order of disassembly, attaching the positive cable first and then the negative cable. Place the positive terminal rubber cover in position and make sure the wires are routed properly so the seat doesn’t pinch them when installed.
Apply dielectric grease to the battery terminals to help prevent corrosion.
Reassemble the motorcycle.