Even though the extended warranty is good for six years, I doubt Kawasaki will cover a dead battery that they claimed would only last five years in the first place. That is just my opinion though so if they do cover them up to six years then great.
Brian
The bike is only covered for 3 years so the extended warranty covers it for another 3 years, that includes everything covered on the 3 year factory warranty, so it would EXTEND the battery warranty. As said before, a lot of anything covered under warranty will be up to the dealer. Ask anyone that rides a Gold Wing. Some dealers cover headlight bulbs and fork seals and others will say it's not covered and not even check with mother Honda.