Alex Lowes says he is enjoying getting better acquainted with the PATA Crescent Yamaha he will race in this year's World Superbike Championship, despite pre-season testing still being hampered by his troublesome shoulder.

After a shakedown of the YZF-R1 in Portimao, Yamaha - returning to the championship after a five year absence - ramped up preparations with a three-day test at Jerez, where Lowes and Sylvain Guintoli were pitted against rivals Honda, Kawasaki, Ducati and BMW.

Though the priority for Yamaha remains development ahead of the Phillip Island opener - now less than a month away - Lowes says he is pleased with bike's progress over those three days, even if his running was limited to short stints as he continues recovery from a shoulder injury.

"We have a lot still to do but it's been a good two days. We have been working through everything including front and rear feeling, and a lot of work on electronics - trying to get a better understanding of the YZF-R1 and its engine character.

"I was limited with my shoulder so I couldn't push too much but I enjoyed it and hopefully we can improve quite a bit before Phillip Island."

Lowes turned in a best time of 1mi 41.361secs during the three days, 1.4secs off To Sykes' lap record breaking pace.