Over the years, I don't think I have ever thought to myself; "Self, if only the OEM battery had more starting power, longevity or protection", but then, I don't race. If I did race, the ability to save up to three kilos for not a huge amount of money would be very attractive, especially considering the same weight saving in carbon fiber body work would probably cost closer to a grand! But to try and keep it in perspective, we are talking here about a saving of a little over 1%, or (and forgive my crudeness) slightly more then going for a good dump before you go for a ride and a lot less then not filling the fuel tank to full. If you are replacing your battery anyway, then a lighter weight option with the same or better performance is certainly worth considering. I just wouldn't consider changing a perfectly good battery for nothing more then bragging rights. Given the bike we are talking about, just how much more bragging rights do we need?