The classification and final bouts of the 63kg and 67kg weights were held on Friday.
Jarkani delivered an impressive performance, defeating Saifulla Kurman of Kazakhstan (10-1), Khusniddin Olimbov of Uzbekistan (9-1), and Vitalie Eremenko of Moldova (3-1) to reach the final. He then beat Chetan Chetan of India 8-4 to claim gold.
In the same weight, Iran's Meysam Delkhani earned a bronze medal after overcoming Dastan Zarlykhanov of Kazakhstan 8-0 in the bronze match.
In the 67kg category, Mohammad Kamali finished fifth, while Ahmadreza Mohsennejad was eliminated early in the competition.
IRNA