How do you change oil in 1996 Yamaha Wolverine 350 ATV?

The drain plug is a large one, slightly to the rear of the center of the engine. When you remove it, be careful not to lose the screen, spring, and o-ring inside of it. Clean the screen and plug in gasoline or other solvent, being careful with the o-ring (some solvents will eat rubber).

Coat the o-ring with clean oil. Refill on the right side of the motor, being careful not to overfill.