Rear wheel bearings

I am planning to change my rear wheel bearings due to some corrosion. The previous owner kept the rear axle dry so the only lubrication there was water.

Are the bearings standard types or do I really have to buy them from KTM?

The types in the spares' cataloque are:
0625060060 BALL BEARING 6006 DDU2CG23S6NM
0625062052 GR.BALL BEAR. 6205-2RSHC3HMTF7
Can I use:
SKF 6006-2RS1
SKF 6205-2RS1?

you can use aftermarket bearings, i bought some from a bearing shop using the ones i took out as samples. SKF are a good brand, easily equal to the genuine part, make sure you ask for C3 rated bearings though.

paul.