Actually the oil has nothing to do with having adjust the valves, O sure you have to have oil for them to work but it has nothing to do with adjusting, the only thing that causes a need to adjust them is them wearing/pounding in to the valve seats, as they do this the clearence closes up and the shims need to be changed to maintain proper clearence, some of the newer bikes can and do go a LONG time before the first adjustment is needed, my ST1100 is at 78,000 and hasn't been touched, checked yes but it's still OEM.
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