Originally Posted by pnw_hd_rider

I realize that it as a bearing, I asked about the tensioner because I was wondering if if metal shavings from the tensioner might have been the cause. I didn't realize the the bearings were so problematic (having failures at such low mileage).

At any rate I would be concerned about pieces of debris (broken cage) roaming around in the crankcase. Just one small piece can block an oil passage, particularly the oil passage in the crank to the rod journal.