Jack Miller has been enjoying his first day back in action since the 2016 season finale last November as his Team Estrella Galicia puts the Aussie through his paces at the Sepang International Circuit in Malaysia this week.

Jack heads to South East Asia fully fit after undergoing surgery at the end of the 2016 season when he had the pin and plates removed from his fractured right leg.

After a brief visit home to Australia for Christmas, Miller headed out to America at the start of the year, where he has completed an intensive training program at the W Training Facility in California.

"It's been a busy winter break,” Miller said. “First came the surgery to remove the screws and plates from my leg and then it was straight into rehabilitation and training to make sure I was fully fit for the start of the new season. The last few weeks have been spent in California, mostly training in the gym and on the bicycle, but I also managed a few outings on the MX bike as well.”

“I'm down to the same weight I was when I was in Moto3 and I'm starting this season fitter than ever before. Now we head to Sepang, where' I'm looking forward to seeing what Honda have brought for us to test. I ended last year pretty well with a positive outing at Jerez and I hope we can continue in the same way in Malaysia."