Dani Pedrosa feels he can still find some more speed from his Honda despite dominating Friday practice at Sepang.
The Spaniard was quickest by commanding margins in both sessions today, and lapped beneath the 2010 pole time - but said he was not entirely happy with his bike yet.
"Today we went pretty fast and consistent even though the track wasn't very clean," said Pedrosa. "We did a good job in both practice sessions, but I would like to improve a little more on the chassis side to feel more comfortable with the front and choose the right tyre for the race distance.
"At the moment we are doing good steps but we need to keep on working with the same style and try to perform well tomorrow in qualifying. We had a bad qualifying in Australia and we want to be stronger here and do it better."
Casey Stoner - who clinched the 2011 championship in Australia last weekend - was second in both sessions today but not concerned by the gap to his Honda team-mate.
"Everything went pretty well today, we're not too far off the pace with race tyres, we did over a race distance and were pretty happy with the lap times we were doing on the soft tyre," said Stoner.
"We then went to the hard tyre and found it a little better and more consistent, we'll have to see what the conditions are like tomorrow but so far we're pretty pleased and the bike feels okay.
"We have some areas to improve on, we need to get the bike turning a little better into the corners, better braking stability and a little more rear grip in the traction area. If we can improve these then we'll move a step closer."