Well if finally happened to me. Today I went for a ride and the front TPMS read out was ----, rear one was fine, went to the dealer and he said he had one in stock but would have to call Kawasaki to see if they would cover it since he thinks it's the battery that went dead.
It's on 09 and I bought it November 2010, I have only owned it 8 months, and it has 7700 miles on it. They better cover it.