here is a before and after of a Bonito......

this Bonito was bone dry on the nose....having tuning issues, but showed no signs of any bearing leaking or anything like that...Until we opened it up there was no evidence of any bearing issues whatsoever....However once we opened up the bearing we found it was packed with dirt...not only was the bearing packed with dirt, but also the dirt had passed right thru the bearing and was actually being sucked right into the engine itself..