[villagetinker]

Many automotive store sell batteries guaranteed for 1, 2, or 3 years, it appears that original Yamaha batteries are in the 1 year grouping as well as the typical replacements. I get the 3 year batteries, and have not been disappointed. I as noted above, get the same group size, and if you bring the battery in, you typically get the core charge ($40 to $50). On the more recent Yamaha's, you need to remove a bolt holding the heat shield in place as this makes removal and installation of the battery much easier. Also, mark (I use painter tape) the positive and negative terminals so you get the battery installed in the correct direction.