The 24-year-old right-back failed to establish himself at Bucs during the 2016/17 season - after joining the club from Lamontville Golden Arrows in August, 2016.
Sikhakhane, who represented South Africa at the 2016 Cosafa Cup in Namibia, did not play under Bucs coach Kjell Jonevret after the Swedish tactician was appoint in February, 2017.
According to the latest media reports, Premier Soccer League (PSL) returnees AmaZulu are set to sign Sikhakhane ahead of the 2017/18 season.
Usuthu, who purchased 2016/17 National First Division (NFD) champions Thanda Royal Zulu's PSL status, have been busy in the current Transfer Window.
The KwaZulu-Natal giants have signed Sadate Ouro-Akoriko, Mhlengi Cele and Ayabulela Konqobe amongst others.
Sikhakhane, who hails from KwaZulu-Natal, made 14 appearances in all competitions for the Buccaneers last season.
He signed a long-term deal with Bucs when he joined the Soweto giants from Abafana Bes'thende.