Being new even without greasing them they should last longer then that. So double check them for yourself. With that said, if they are the yellow ones, they will wear faster then the updated black ones...however know that the black ones are still not Delron plastic which is self-lubricating and is what ASR uses. Many including me bought the ASR kits for the RzR 800s and had to glue the bushing into the a-arms as the fit there was too loose and..as CFM used their own sleeve..which is slightly smaller in diameter then what the ASR bushings need ...there was a little play there. The up-side was that play didn't change much in several thousand miles. I have some "How Tos" in the how-to section on doing this...some in a video as I recall. Recently my rear knuckle bushing started getting play...probably because of the wheel spacers...and decided I would go back to a set of CFM black bushings and new sleeves. I was not happy about what I had to pay for these but...at least no play..and I will grease them before every ride now instead of every other.