I need help finding a replacement bearing for my xcube stamped.
I think it might use size L wich is what some ILYY use.
any help would be great,
thanks 
Yes it is indeed a ILYY size bearing.I have no idea online where to buy one.But I buy from a local bearing store but they need cleaned badly when they arrive. The deminsions are: 6x13x5mm
How would I clean them with a compersed air or lube?
What xcube yoyo do you have by th way?
YYE Sells the ILYY bearings
Use a solvent like mineral spirits or lighter fluid. Blow the solvent out w/compressed air.
Look here for more info:
List of useful modification and maintenance guides