New Red Bull KTM signing Jack Miller completed a clean sweep of the Jerez Moto3 test, setting his fastest lap of the week during the final Thursday afternoon session.

Already comfortably under the official circuit records after day two, the young Australian lowered his best time by 0.232s as foggy morning conditions gave way to a brighter afternoon.

"It was definitely a good three days of testing; it was very productive, we made a lot of improvements and also found a lot of negatives as well, which helps us in the long run," said Miller.

"We were able to put in laps consistently, which was our main goal. I felt very comfortable on the bike, KTM brought us plenty of stuff to try out and I enjoyed myself on the bike, which is the main thing. You can't just test, test, test - you have to have some fun on the bike as well.

"I can still improve my lap times and there are some small things that need further improvement in order to go faster. I didn't expect this lap time as such, but I had hoped to be close. To go round under the circuit record, though, is really good."

Miller, who had been second fastest to Niccolo Antonelli during the opening official 2014 test at Valencia, left Jerez 0.210s ahead of Jakub Kornfeil - the Calvo KTM rider improving significantly from his 13th overall at Valencia.

Gresini's Antonelli was third overall (+0.406s) with Miller's rookie team-mate Karel Hanika (+0.599s) completing an all-KTM top four courtesy of his day two lap time.

The Husqvarna branded KTM of Danny Kent (+0.600s) and VR46 KTM rider Romano Fenati (+0.604s) also set their best on Wednesday, but Kent's team-mate Niklas Ajo improved to fourth on the final day for a close seventh overall (+0.612s).

Fenati's team-mate Francesco Bagnaia was a fraction slower, with Alex Marquez leading the Honda challenge in ninth (+0.836s) courtesy of his day two time, having dropped to 15th on Thursday.

Marquez's Estrella Galicia 0.0 team-mate and title runner-up Alex Rins missed the test due to recent wrist surgery and was replaced by CEV champion Fabio Quartararo. The Frenchman claimed the 14th fastest lap of the week, but was a creditable 0.919s from Miller.

The leading Kalex-KTM competitor was Livio Loi, the young Belgian claiming a strong sixth on the final day, which translated to twelfth (+0.860s) on the combined timesheets.

The top Mahindra was factory rider Miguel Oliveira, who took a test best of seventh on Thursday for 13th overall (+0.863s). One place behind the Portuguese was the leading Kalex-KTM of Aspar's Juanfran Guevara (+1.003s).

The third and final official Moto3 test will take place back at Jerez from March 11-13.