Marc Marquez concedes rival Yamaha has a one-second advantage over Honda in terms of race pace after three days of MotoGP testing at Sepang.
The Spanish rider was unable to match the pace of Yamaha duo Jorge Lorenzo and Valentino Rossi as Honda continued to struggle with the new mandatory electronics to be used this year.
Marquez admitted the gap, especially in race conditions, was worrying.
"For one lap maybe not, but for the [race] rhythm yes, [the gap] is 0.9 to one second per lap, and that is a lot," Marquez said.
"We made a bit of progress. It's a little bit easier to keep the pace, but anyway we are struggling and we are far from where we want to be.
"I haven't pushed 100 percent. As you can see I haven't crashed during the three days (laughs).
"The bike is still not ready to on a time attack. I didn't push 100 percent, but even when I pushed it looked like we were far from the Yamaha riders."
When asked what Honda needed to improve its pace, he said: "That's a big question mark even for us. The problem for me is that with the electronics we are too far from the level.
"It's what I said at the end of last season: with the new electronics maybe some manufacturers will arrive in the first test and fix them, and maybe others will struggle more.
"Maybe we chose the wrong way, but now we are trying to go in the right direction."