Tried it, no success. Guess in my case exchanging the faulty part (what will hopefully not be the whole motor but only the bearing) and cleaning out the inner section of the motor will be the only solution.
For the record: Big bearing pointing to the inner part of the axle reads NSK 6908-VV (so inner diameter should be 40mm, outer 62mm, thickness 12mm), small bearing pointing to outer part of axle reads NSK 6904-VV, inner is 20mm, outer 37mm, thickness 9mm. At least for the 75kv model that is.
@torqueboards can you confirm and complete?