Somewhere in this forun I read that silicate free antifreeze was not compatable with brass. The thought just occured to me that I have been using that stuff in my liquid cooled Honda mower for years without any problems whatsoever and it has a brass radiator too. I haven't seen any signs of corrosion so with that evidence I have concluded that this stuff is safe for my bike. In fact I have never replaced a water pump or even a seal.I do use Prestone's antifreeze conditioner (name ??) and it has a polymer lubricant in it that saves pump seals. Been using that for many years too.