The amount of oil flowing out of the squirt nozzles is tiny by comparison to that thrown about by the bearings. So there needs to be a specific requirement to control piston temperature for it to be even considered. The K series simply doesn't need oil squirts to cool the pistons, as it doesn't suffer from thermal failure of the pistons. It can suffer from split piston crowns on odd occasions, but otherwise the K series is bomb proof in standard or modified form.