2000/2001 scrambler 500 2×4

I called the dealer for a part and they said they needed the vin in order to get the right part. He mentioned they made a lot of changes in that year. My question is when is the cut off date for the year. It has a tag on the front of the atv with a manufactured date of October 2000. I would imagine this is a model year 2001. All that being said, would the rear axle bearing be the same? I called originally about a handlebar post.