Crankcase difference between 91 and 94?

[blackz34]

I might need a new right crankcase because I found a haircrack next to a bearing and the bearing fits loose in the hole. Anyway, mine is a 94 but I need to know wich year can fit. I saw that 1991 have a different part number but is it just because they are black or it won't fit with my other half?

Thank you

[dannygraves]

If I remember correctly '90+ are all the same with the color change in '94 being the only difference. '88 and '89 could work, but the opening for the sleeve would have to be machined.
can't remember if '89 had the new or old sleeve, now that I think about it, I think '89 is fine too.