The KTM 85 SX airbox is designed to optimize the small space available to deliver the best possible performance, while still maintaining the highest level of filter protection. The air filter is easily accessed, without tools, by removing the left side panel. Knowing that air literally breathes power into the motor, KTM has ensured that the process of inserting a new clean filter could not be any easier. The Twin Air B.V. filter and filter cage design features a simple fail-proof mounting system, making filter maintenance a quick, easy and accurate task.