Nicky Hayden says Red Bull Honda is still searching for outright lap time gains despite a positive test at Aragon which was halted prematurely by a technical issue.

The former MotoGP world champion recovered from a disappointing retirement in race two in the Aragon World Superbike race weekend to post a total of 69 laps with a best effort of 1m 50.837s in the official one-day test.

The American rider was denied a late blast using different Pirelli tyre compounds to further improve his lap time but ultimately left the test downbeat by the lack of outright lap time gains.

Hayden ended the Aragon test ninth overall on the timesheet by 1.5 seconds off of fastest rider Tom Sykes.

"We mainly worked with the general setup of the bike, trying some basic changes and I felt better," Hayden said. "Our lap-times improved very little; surely some more improvement in that department would have been good.

"The guys have worked really hard, especially as some of the changes to the geometry we made took quite a bit of time. We wanted to try some new tyres at the end of the day but we had a couple of technical problems, which we thought we had sorted out after Thailand. Overall, though, I'm quite positive with how today went."

Hayden and Red Bull Honda will now return to base ahead of another in-season test at Portimao in two weeks before round four of the 2017 World Superbike championship at Assen on the 28-30 April.