Bearing failures were more commonn on the older (pre '02) bikes, and were almost always limited to the ignition side. The '06 uses a two piece roller bearing in the ignition side, and a ball bearing in the primary side. You say the bike has little time on it and its an '06? In the UK? I could go out on a limb here and say that moisture/corrosion killed that bearing. I've seen it before, from improper washing (water in crankcase) and/or storage. Do you know the detailed history of the bike? It could have been drowned also, which most often leads to bearing failures later from dirt being carried in with the water.
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