What is the best oil for a yz125?

For a Yamaha YZ125, the best oil is typically a high-quality two-stroke oil specifically formulated for dirt bikes. Look for synthetic or semi-synthetic options, as they provide better lubrication, reduce engine wear, and enhance performance. Brands like Motul, Maxima, and Bel-Ray are popular choices among riders. Always refer to the owner's manual for specific recommendations regarding oil types and mixing ratiOS.