Here's why:
* Oil Change: The YZ250 uses a wet sump oil system. This means the oil is stored in a sump at the bottom of the engine. When you change the oil, you are simply draining the entire sump and replacing it with fresh oil.
* Screen: Instead of a filter, the YZ250 has a screen that sits at the bottom of the sump to catch larger debris. This screen is cleaned during oil changes.
* High-Quality Oil: The YZ250 is designed for high-performance racing, so it's important to use high-quality oil that is specifically formulated for motorcycle engines. This oil is designed to withstand the high temperatures and stresses that the engine experiences.
While the lack of a filter may seem strange at first, it's actually a common design feature on many high-performance motorcycles. The YZ250's engine is built to be extremely durable and reliable, and the use of high-quality oil and regular maintenance is essential to keeping it running smoothly.
