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 Topic: Koyo main bearings.. 







Enessr

 
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Koyo main bearings..

Enessr » Thu Jan 29, 2026 9:31 am

Morning everyone,
Can someone reccomend the proper Koyo engine/gearbox bearings?
Mine are all shagged so whilst I'm rebuilding I'll change the lot.
Problem is that the Koyo codes 6305R refer to atleast 8 different bearings
available...
Some very cheap and the others double the price, €8 to €40. each..
Some have an oil seal on both sides, horrid plastic ball b3aring dividers etc.
So, basically what code matches the high revving mc21 engine?
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