Can you use 10w40 oil in my yz85?

Using 10W-40 oil in a Yamaha YZ85 is not recommended, as this model typically requires a specific type of two-stroke oil designed for its engine. The YZ85 is a two-stroke bike, so you should use a high-quality two-stroke oil mixed with gasoline according to the manufacturer's specifications. Always check your owner's manual for the recommended oil type to ensure optimal performance and avoid engine damage.