In 1924, four of "Yakumo"s 12-pounder guns were removed, as were all of her QF 2.5-pounder guns, and a single 8 cm/40 3rd Year Type anti-aircraft gun was added. In addition three of her torpedo tubes were removed. Three years later, her boilers were replaced by six Yarrow boilers, formerly from the battleship , which reduced her power to and maximum speed to . These boilers used a mix of coal and fuel oil, and the ship now carried a total of of coal and of oil.