Marc Marquez has said Honda needs to "work much more" after he spent Wednesday assessing the 2017 engine, which has both good and bad points.

The 2016 world champion has complained of a lack of acceleration throughout the season, a feature he regularly had to overcome with breathless late-braking feats.

However, the test in Valencia showed that the engine does not remedy this weakness, although he did say it provides better grip, and more user-friendly when applying the throttle.

"All the day was on the new bike," he said at the end of the second day, having finished just 0.196s off Maverick Vi?ales' fastest time of the day.

"Just at the end of the day I did another kind of long run with the current bike. Today again was like yesterday. We did a big change on the bike to try to understand.

"We spend the day not only playing with the springs to find the best way, we did a big change. Still we need to work because when I did the long runs it was a completely different bike to what I used in the race.

"But even like this I was fast but I was struggling in some points. You know, I'm happy about the job that we did here. We must work much more. Honda needs to work much more this winter to give me something more in Malaysia.

Pressed on where the 2017 engine is better, Marquez said, "Where is it better? It looks like I can have a little bit more grip. I can manage a little bit better with the gas, some positive things.

"Then also it's a completely different engine so the electronics, the base that we have is made for the current bike. This new engine, when the tyre drop, we still need to adjust many, many things. Our weak point that is the acceleration still is there.

"Today again was like yesterday. We did a big change on the bike to try to understand. We spend the day not only playing with the springs to find the best way, we did a big change.

"Still we need to work because when I did the long runs it was a completely different bike to what I used in the race. But even like this I was fast but I was struggling in some points.

"You know, I'm happy about the job that we did here. We must work much more. Honda needs to work much more this winter to give me something more in Malaysia."