Crank bearings

Sr50 minah

New Member
What bearings should i buy for a pretty powerful mid-race moped? Hebo manston, yasuni c21.....
I saw some Stage6 skf, Polini skf are they any different or just basic skf bearings?
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They are just basic skf bearings sold by different companys with a raise price tag.
Cant really see that there would be any difference between them.