Transmission bearing has oil groove?

floundermay

New Member
Nov 5, 2024
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I am in the process of rebuilding a blaster for a friend. I ordered a replacement bearing for the transmission part# 93306-30421-00. The bearing that the shaft that goes to the sprocket goes through. When I pulled the bearing out of the case it has a groove abound the circumference of the bearing. The replacement bearing does not.
This quad was abused by the previous owner so I have no idea if this is even the original bearing. I will try to figure out how to post pictures tonight. but was hoping someone with experience might know what is up.

Thanks