Repsol Honda's Pol Espargaro is still looking for added one-lap pace from the RC213V despite leaving the Jerez MotoGP test 'happy'.
The Spaniard ended with a six-tenth gap to leader Maverick Vinales after Honda worked through a comprehensive schedule of parts and settings.
"We have worked on many things, electronics, aero, ergonomics, they seem simple or small topics but when you’re still new to a bike they can make a big difference together," said Espargaro, speaking at the track.
"We have performed well today, I was close to Taka who has been the strongest Honda this weekend, so I am happy.
"I always say, even if the things we test work or not, we are learning. It's a process we need to go through. We need to be open minded and keep trying things and don’t be scared of mistakes or problems. It's a matter of laps, understanding, experience.
"We have learned a lot today and it has been very good for me to ride and try things without the pressure of a race weekend.
Putting one lap together with a fresh soft tyre is still taking some time, I think it's a problem for all riders that have changed bikes because you need to know a bike well to take it to the limit."
Team-mate Marc Marquez didn't put in many laps after two big crashes over the weekend caused his body to 'lock up'.
"We didn’t really test, just one run because on the second run my body was already locking up," said Marquez, speaking at the track.
"My neck and my right shoulder were stiff, it’s similar to after Portimao but I was not as locked up as I was after Portugal. The crash I had on Saturday didn’t help with my physical condition.
"I thought that maybe today when my body had warmed-up it would be better, and I could try but straight away I could tell I wasn’t at a good level for riding.
"We spoke as a team and decided to stop the test, we need to understand that we’re improving step by step and the next target is Le Mans where we will try to improve again.”