Bradley Smith tested a factory-spec chassis, seat unit and fuel tank for the first time in Valencia as the British MotoGP rider returned to the saddle after a rest day.

The new parts were used by factory riders Jorge Lorenzo and Valentino Rossi this season and Smith was hugely impressed by the upgrades on his Yamaha Tech 3 M1.

The 22-year-old set a best time of 1m 31.397s to finish ahead of Rossi in sixth place after completing 78 laps in Spain.

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"It was definitely worth taking a rest yesterday because I had to do a lot of laps today and now my brain is full of information after a very positive day," he said.

"It was important for me to ride a lot to really assess the new parts in such ideal conditions.

"Immediately the updates gave a great feeling. I did a few laps on the bike I raced on Sunday to start with but on my first run on the new bike I was instantly faster and felt more comfortable in the areas where I have been struggling all season," Smith added.

"I got a lot of feedback from the bike and I was clearly faster on the harder tyre, which was not easy for me during the race weekend.

"My feelings with the rear improved and the bike stops better on a full fuel tank, so I am really satisfied. I am closer to the top position too, which is another big plus for me."

Smith will experiment with different settings on Wednesday and is already 'excited and optimistic' with the new package for 2014.