Aprilia's Stefan Bradl admitted there is 'a lot to learn' with the new control ECU that will be used in MotoGP next season after testing the software at Jerez in Spain.

Bradl, team-mate Alvaro Bautista and test rider Mike De Meglio rode the RS-GP machines as they await the new 2016 prototype and also continued to work with the Michelin tyres.

The German rider didn't feel comfortable enough to push for a fast lap but was satisfied with the progress made at Jerez as he enters the winter break.

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"We focused on the new electronics and there is really a lot to learn. This is a different kind of work than usual," Bradl said.

"It may seem boring because of the long breaks but right now that is necessary both to provide information to the engineers and to create a base for the Aprilia Test Team to work from during the winter break.

"We certainly weren't concerned with lap times. The feeling still isn't right to push hard but I'm confident that the work we did over these past days will help us in 2016," he added.

"Now I'm happy to be able to take a few days of holiday and prepare for the new season as best as possible."

Spaniard Bautista came off on the final day of the test on Friday and was forced to call a halt to his programme after experiencing pain in the left side of his neck and shoulder.