CM871 - camshaft bearing issue

[PekySVK]

i replaced camshaft after bearing spun. first time and now i will replace it again ... also camshaft was installed properly. entire engine was put together by the book.

crankase filter is maintenance free. oil pressure is 40 on cold start and 28 - 30 on operating temperature .

i don't know what brand of bearing was used. head was in machine shop while inframe and was completely rebuild. didn't have issue with had before i let machine shop rebuild it after 200k .