Kamma Vipāka can be active during Kappas or even Maha Kappas. Sometimes it takes the merits of another person to thwart a harsh Vipāka. Losaka Thera had prevented an arahant from eating during the time of Lord Buddha Kassapa. As a result of this action, he was born several times as a hungry Preta. Even when he became an arahant, he had difficulty feeding himself. Food would disappear! Venerable Arahant Sariputta had to hold his bowl for him to eat. On the same day, Venerable Arahant Losaka Thera entered Parinibbāna. See Losaka Tissa Thera.
See also the story of Venerable Bakula Thero. This is an example of Kusala Kamma which gives fruits of Maha Kappas later. He cured Lord Buddha Anomadassi from an illness. During the Sasana of Lord Gautama Buddha, he was declared the healthiest disciple. He never fell ill in his last life and he attained Parinibbāna at 160 years of age. Yet it is a good deed that goes back thousands of Maha Kappas.