Milwaukee Yamaha's James Ellison is seeking a change in fortune at Thruxton on Saturday after a technical issue slowed his progress during the opening day's free practice sessions.

Ellison, who claimed victory in race two for Shaun Muir's team at the opening round of the MCE British Superbike Championship at Brands Hatch, finished in 17th position on the time sheets.

The former MotoGP CRT rider had been eighth in the wet after FP1 but dropped outside the top 15 in the afternoon.

"Today we had a tough afternoon as we had some issues and we are now figuring out what the problem was as we seemed to be struggling with power," Ellison said.

"Whenever we accelerated it felt like we were starting from scratch, so the boys in the garage are working on that now and I am sure that we should then be set for the morning.

"Tomorrow is another day; we have qualifying to look forward to and hopefully we can get a good position for the Milwaukee Yamaha team."

Josh Waters was seventh fastest in FP2 as the track at Thruxton dried out and has been boosted by his early form on his debut at Thruxton.

"Today was better for me than the first day at Brands Hatch and it all came together faster for me here," he said.

"I had a lot to learn having never seen the track before, but we had better conditions than at Brands Hatch with the track temperature so I think that helped me.

"I am feeling more prepared and we will see how tomorrow goes but overall I am happy with how it has gone so far and looking forward to qualifying."