Can you put 14 inch tires on Yamaha grizzly that has 25-8-12 on front and 25-10-12 on rear?

No, you cannot put 14-inch tires on a Yamaha Grizzly that is designed for 25-8-12 on the front and 25-10-12 on the rear. The numbers indicate the tire diameter in inches, and switching to 14-inch tires would not fit the wheel specifications of the ATV. It is important to stick to the manufacturer's recommended tire sizes to ensure proper handling, safety, and performance.