the thing is the only part of the stock rocker gear that needs oil is allready supplied oil via the push rods. its the rocker to shaft that needs the oil and a small splash on the valve tip if your on stock rockers.
only thing i have seen on high rpm motor with big valve spring pressures is swivel feet adjusters seizing then breaking, not sure if this is down to poor parts of there seizing due to lack of oil.
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