125-200cc Power Valver Governor for CR125

Following on from my last post about lack of power and finding the stripped power valve governor gear.

Can anyone shed any light on this?

Three different part numbers for the various years:
98=8000 83096
99-01=8000 90340
02-12=8000 99753

Wallybean confirmed that any of the later years will fit my 1998 CR125 but im just wondering if there are any differences as when I spoke with Husky sport I was told that all part numbers where still valid eg the older parts hadn't been superseded?

Or was it just a case that they had an old 98 one sitting on the shelf?

I have since ordered a used 99 version of ebay, just very curious as to what differences there may be?

Thanks