I know this is a link to another site but I feel its important that all RZR owners see this critical information before they ruin their engines. this link will take you to a thread which will show you detailed photos of exactly where the dirt is entering the air box on your new RZR and will give you a good idea of how to fix it. dont put it off as you can ruin your brand new motor in less than an hour of riding time! clicky here!