Brad Binder put his updated Red Bull KTM fastest during their final day of Moto3 testing, at Valencia.
Followed a test at Jerez last week, Binder and new team-mate Bo Bendsneyder faced Honda rivals such as Enea Bastianini, Jorge Navarro, Niccolo Antonelli and Aron Canet during the private Valencia outing.
Navarro was quickest overall courtesy of a 1m 39.122s on Monday. However Binder - who only rode on Tuesday - set the day two pace with a 1m 39.607s.
"Today we went out with the base setup with which we finished the Jerez test, which featured new upgrades that worked so well,” explained the South African, South African Binder, who took four podiums this season.
“Overall, the day went quite well. Although throughout the day we have tried out things that have not been as good as expected, at the end of the day we were back feeling very comfortable and riding fast.
“The lap times were very good and I managed to go faster than I had in the entire GP weekend as well, which is very positive. I feel confident and at ease. I will travel to South Africa tomorrow and get some rest before working hard on my fitness."
Red Bull Rookies cup champion Bendsneyder used both days to continue his adaptation to his new KTM machine, completing a total of 151 laps and was fourth quickest on Tuesday behind Binder, Canet and Antonelli.
"These two days of testing went very well, despite me being a little sick. Monday was a little more difficult because I was riding at a new circuit, with a bike that is practically new to me,” he said.
“However, today we improved a lot with both the setup and my lap times. We must continue working and improving, because we have plenty of room to do so - especially with new tyres.
“I'm very happy with how 2015 has ended, because I was able to put in a lot of laps and, step-by-step, I feel more comfortable and faster. Now I am going to focus on school, supermoto and fitness training."
KTM's next test will be in February.