During initial service (@ 230 miles) discovered air cleaner was very dirty and needed to be replaced ($47)? I principally ride in the S/W desert of Nevada where plenty of dust does occur on the roads and trails. I try as best I can to minimize exposure to dust while driving in the desert. It appears to me to be a design flaw absent a barrier between the air filter and intake to filter out some of the dust before it arrives in the air filter? Has anyone else experienced this short shelf life of their air filter, and or, found a work around to a likely dust intake problem??