Alex Lowes says he gritted his teeth through the battle with his shoulder as he and Pata Yamaha team-mate Sylvain Guintoli got their 2016 rolling with a two-day test at Portimao.

The 25-year-old suffered a dislocated shoulder while testing the Yamaha R1 at Jerez in November and required minor surgery during the holiday period. Despite fighting back in time for Yamaha's first test of the new year he has admitted the shoulder was playing up but was able to work around the problem while helping his team with its development programme.

Indeed, the 2013 British Superbike champion completed 116 laps across the two-day test working on improvements to its electronic package and improving chassis set up.

"It has been nice to get out on the bike, especially after a difficult winter, and we've started to really work. We've had a lot of new parts to test but our main focus has been electronics and trying to find a good chassis setting that suits me," Lowes said. "My shoulder was ok-ish! I'm hoping a couple of days rest will do it good and I'll be able to ride more properly in Jerez.

"There were some areas that I struggled with the last time I rode the YZF-R1 which were much better this time, so they have worked really hard over the winter, so thanks to them for that. We have had a few hurdles, but it was good, I really enjoyed it and I'm looking forward to getting to Jerez and continuing to work hard."

Lowes and Guintoli will now travel to Jerez for a second two-day World Superbike test on the 26-27 January.