A depleted Olney side were made to pay the price as Harborough romped home in confident fashion on Saturday, winning 39-0.
It was soon apparent they had a difficult job on their hands as the home side took immediate advantage kicking themselves into a 6-0 lead.
The home side ran in two tries before the interval too to lead 20-0 at the break,
The second half went a similar way to the first, with Harborough in the ascendency and looking for the bonus point.
They ran in three second half scores to put the result beyond any doubt, completing the comprehensive victory at 39-0.