RE: Saito 125 engine bearing failure
I have bought many pair of bearings from Paul at RC Bearings. I use Pauls store exclusively now.
I like to use the stainless ones and have good service from them.
I have seen a lot of Saitos in the last few years have just as horrible of bearings as OS engines. Lets face it, these companies are buying poorly manufactured bearings, regardless of what company made them.
Castor helps the rust thing more than anything else, but a bearing that is going to fail is going to fail no matter what or how much oil you use.