Chassis and electronics were the main areas of focus, in search of better traction and power delivery, after Aleix Espargaro and Maverick Vinales were left fighting over tenth place at the Sachsenring.
Rookie Vinales impressed by matching the pace of Repsol Honda's Dani Pedrosa and Ducati's Andrea Iannone around the resurfaced Italian race track.
"I have the feeling that this test has been very useful for us, we understand better where we can improve and we have worked to prepare for the forthcoming races," Vinales said. "I did many laps in a sort of race configuration with a full tank and dedicated set-up, and I felt better and better on every run.
"At the beginning I had a bad feeling with traction on the exit but also had trouble with being fast on the entrance into slow corners. We applied many improvements to the chassis and they gave positive results. Now we have many options that we already know can be useful or be adapted to every single circuit.
"For the feeling that I have now I wish Indy was next week, because with these improvements I feel very comfortable on my machine, but we also need some time to take a rest and - most importantly - to review all the data and consolidate our information."
Experienced team-mate Espargaro, who has finished ahead of Vinales in all races they have both finished this season, was 0.1s slower in terms of best lap time.
"The extremely hot weather conditions made this testing very hard, but I'm very happy for what we achieved," he said. "After Sachsenring it was important to get back some feeling with the front, especially in slow corners, and we could finally test several set-up configurations that at the end gave me very positive feelings.
"We have also improved with the electronics and worked in race configuration, verifying the c onsistency of performance with hard tyres, even though we didn't make any long runs or race simulations. The machine is reacting very well, the feeling I have is positive and the most important thing is that we could find different ways to approach the future races and set-up situations.
"This is important for a new team as we are. Now we switch off the mind for a while and enjoy a little break, but to be honest I'm looking forward to starting racing again because I feel the need to recover from the bad performance in Sachsenring."
Team manager Davide Brivio added: "Both riders can now go on vacation with a positive mood and feeling: They both worked very hard in this heat and they both found a new feeling with their machines."
Suzuki hopes to debut its seamless shift gearbox 'soon' but no mention was made of any track testing at Misano, meaning the technology is unlikely to be seen at the next round in Indianapolis on August 7-9.
Thursday lap times:1 . Marc Marquez (Honda) 1m 32.0s2. Andrea Dovizioso (Ducati) 32.5s3. Dani Pedrosa (Honda) 1m 32.66s4. Andrea Iannone (Ducati) 1m 32.7s4. Maverick Vinales (Suzuki) 1m 32.7s6. Aleix Espargaro (Suzuki) 1m 32.8s
