Jack Miller was back on Yamaha's V4-powered M1 during the Valencia MotoGP Test after the final race of the season.

The Yamaha MotoGP riders were able to test the new Yamaha V4 engine during the Tuesday Valencia MotoGP Test on the 18th of November.

Jack Miller was the first Yamaha on track after the track condition delay at the start of the day, but by the time the chequered flag fell, Miller was 20th on the timesheets after completing 51 laps.

Despite his hard work on Tuesday, there is still a lot of work ahead of the Japanese manufacturer, but Miller is 'not afraid of a little work'.

"It was a busy day, I did a lot of laps," Miller told MotoGP.com after the Valencia Test on Tuesday.

"I was shaking down the new bike and trying to understand it. Trying to make some headway in the development. We have got some work ahead of us, but I am not afraid of a little work."

Miller, Fabio Quartararo, Alex Rins, and Toprak Razgatlioglu were back on track on Wednesday, the 19th of November, for a private Yamaha Test at Valencia.

The Australian rider revealed that he had 'some clear issues' that he needed to work on during the private test.

"Still the plan going into tomorrow, we have some items to try tomorrow," he explained.

"Today was about gaining experience on the bike. We have some clear issues we need to work on. Going into tomorrow, we have some items to try to fix the issues and give us as much speed back as possible before the break.

"The engineers will go away and try to come up with some solutions over winter, and bring us some developments come Malaysia."