In the elite men's 4000-metre team pursuit at Invercargill, Duffy and compatriots Lucas Plapp, Conor Leahy and Godfrey Slattery clocked 3:59.367 to qualify four seconds faster than New Zealand (4:03.304).

The Aussies were again too strong for the host nation as they claimed gold in the final.

The result completed a dream fortnight for 19-year-old former St Finn Barr's and St Patrick's College student Duffy who was only called up to the Cycling Australia track academy earlier this month.

And there was more medal success for Launceston in the women's event as former junior world champion Lauren Perry teamed up with Josie Talbot, Ruby Roseman-Gannon and Nicola Macdonald to claim bronze.

Burnie's Dalton Stretton added another gold medal in the junior men's 4000m team pursuit.

Stretton teamed up with compatriots Oliver Bleddyn, Alastair Mackellar and Angus Miller to qualify second fastest in 4:15.168 just behind a Kiwi quartet's time of 4:14.436.

However, the Aussies reversed the order in the final to take the title.

Teaming up with Daniel Googe and Jai Fielke, Burnie's Lachlan Spurr qualified fourth fastest in the junior team sprint to progress but again finished fourth fastest (in 48.809) to miss out on the bronze medal.