I just bought an atc 125m 1985 model. It has 3 different size tires on it. I can not figure out which ones to buy. I want the oem ones but even though they look the same and have the same size on the sidewall the are much different. They are all pa3-3 , one is pa3-6, one is pa3-8. I had ordered some for my 110 and they were pa3-12. Does anyone know what I need to stay original? Were the pa3-12 the right ones for my 1984 110? The tread patterns all look alike.