Pity poor Jorge Lorenzo. Once again he comes to a test and tops the timesheets, and everyone is talking about someone else. This time, though, he will probably not mind, as he was not really out for glory at the test, just to work on settings before heading to the next test at Aragon on Wednesday. If it isn’t rained off that is.

Lorenzo chose to skip the morning session, preferring to rest after an impressive win on Sunday, but once underway he was quickly up to speed hitting the top three after just a couple of laps, and ending the day on top.

The Factory Yamaha man had been working on setup, but had also tested a new fuel tank. The new tank does not change the weight balance from the current version used by the factory riders, but it does have a slightly different shape to fit under the seat more comfortably and allow Lorenzo to position himself better on the bike.

On the other side of the garage, Valentino Rossi was once again pursuing weight distribution changes to improve his feel with the bike, especially to help him in braking. A more radical change was planned for the afternoon, but a fast crash at Turn 3 left the bike damaged, meaning that plan had to be abandoned.

Rossi returned to the track at the end of the day to test the new rear tire Bridgestone had brought, and was positive about the feel of the tire. The new construction hard rear tire was a clear improvement, Rossi said, and it was good for the hard rear to once again be an option.

So far this year, the only tire that has worked at most tracks has been the softer option, leaving the riders with a de facto rear allocation of just seven rears for a weekend.

Jorge Lorenzo has topped the timesheets at the end of the Barcelona MotoGP test, but the talking point of the test was Suzuki. On its first public run out, Randy de Puniet clocked a time of 1’42.676, just over three quarters of a second off the time set by Lorenzo, an impressive debut.

Nicky Hayden set the second fastest time, close behind Lorenzo and ahead of Stefan Bradl. Both Hayden and Dovizioso ran back-to-back tests with the existing Ducati GP13 and the lab bike, but neither man was convinced that the lab bike was a step forward.

This is going to be a big weekend in MotoGP, perhaps one of the most significant in a long while. The outcome of Sunday’s race is unlikely to be earth-shattering – the chance of the top three being entirely Spanish, and composed of two Repsol Hondas and a Factory Yamaha is pretty large – and the championship will look much the same on Sunday night as it does now. Yet this weekend will be key.

Much of the interest – and intrigue – revolves around the test on Monday. The most visible piece of the MotoGP puzzle will be in the Suzuki garage, where their brand new MotoGP machine is due to make its first real public debut.

The bike has had a number of private tests, some more secretive than others, the latest being last week at Motegi with Randy de Puniet. The times that were leaked from that test were respectable, though with only test riders for competition, it is hard to put them into context.

At Barcelona, a public test, with official timing, and up against the full MotoGP field, there will be nowhere to hide. Will the Suzuki be able to match the times of the Hondas and Yamahas? Unlikely, the bike is still at an early stage of development.

But it should be faster than the CRT machines, and close to the Ducati satellite bikes. De Puniet’s first target will be himself, and the time he sets during practice and the race on the Aprilia CRT he rides for Aspar.

Max Biaggi’s brief return to MotoGP is over. After two days of testing Ducati’s MotoGP bike at Mugello, filling in for the injured Ben Spies, Biaggi returns to his day job, as TV commentator for the Italian coverage of World Superbikes.

Two short days were not really enough time for Biaggi to get back to grips with a MotoGP bike, especially given that testing stopped early on both days after rain started to fall in the afternoon. Biaggi faced two problems, returning to riding at speed for the first time in eight months, and returning to a MotoGP bike for the first time in over seven years.

Given those difficulties, the times he set in the end were respectable. According to GPOne, who had reporter Luca Semprini on location, Biaggi’s best time was a lap of 1’52.1, which would have seen him qualify in 23rd position for last Sunday’s MotoGP race, just ahead of Hiroshi Aoyama on the FTR Kawasaki CRT machine.

Max Biaggi is back on a MotoGP machine, for the first time since he lost his ride at the end of the 2005 season. The reigning World Superbike champion took to the track at Mugello today to test Ben Spies’ Pramac Ducati, and get a feel for a MotoGP machine again.

Biaggi was invited to ride the bike by Ducati, mainly just as a friendly gesture towards an old rider, but in part also to give his input on riding the bike. With Spies still absent recovering from his shoulder injury, putting Biaggi on the bike was an interesting prospect. Because of Biaggi’s Italian connections, he rode Spies bike, but with bodywork from Iannone’s Energy.TI machine.

In a series of posts on his Twitter feed, Biaggi took some time getting up to speed on the machine. An enormous amount has changed since Biaggi last rode a V5 990cc Honda RC211V back in 2005, all of which take a lot of getting used to. The spec Bridgestone tires and the amount of electronic rider aids are two of the biggest changes, though the electronics on the factory Aprilia RSV4 WSBK machine are already highly sophisticated.

Max Biaggi is to make a surprise return to riding a MotoGP machine. The former 250 and World Superbike champion will take a seat on Ben Spies’ Ignite Pramac Ducati as part of a one-day test at Mugello, as part of Ducati’s testing program, according to Italian site GPOne.

Spies was scheduled to stay on at Mugello to take part in a two-day test, but after the first day of practice at last weekend’s Italian Grand Prix, it was clear to both Spies and Ducati that his shoulder was still too weak to ride a MotoGP machine. With work continuing on the Desmosedici, it was important for Ducati to get as much data as possible on their bike, and so Biaggi was offered the chance to ride the machine.

There are a lot of things that make Mugello special. Its location, in the heart of Tuscany, a sumptuously beautiful part of the world; its layout, fast, flowing, winding naturally up and round the valley it is set in.

The wide open nature of the track, all third and fourth gear combinations which require the perfect combination of intelligence, talent, and sheer courage that make it close to the perfect test of skill. It is fast, it is flowing, and it is undulating.

Even the front straight isn’t really a straight, but a rolling sinew of asphalt that winds down to the first corner. You come down out of the last turn, hammer on the gas, shifting up to sixth as you go, and ride up the rise towards the crest.

Drift right then left through the slight kink in the straight which becomes something resembling a 330 km/h chicane, then just as your front wheel floats free over the crest, you need to get it back down again and get on the brakes for the first corner, the 90 km/h San Donato.

The straight and the braking area are immensely difficult to get right, and a simple error can leave you hurtling into the gravel. Or, in the case of Marc Marquez, drifting towards a wall.

Each rider has their own technique, but subtlety is the key to getting it right. Jorge Lorenzo told the press that he does not really brake over the crest, nor does he use rear brake to keep the front down, but instead Lorenzo rolls off the throttle a fraction.

This puts the front tire back in contact with the tarmac, and allows him to brake at full force for San Donato. Dani Pedrosa’s technique is slightly different, but achieves the same result. “You never really hit the brake at once,” he said, “you squeeze and put the pressure a little after.”

I don’t know why Ducati Corse is calling this video “Ducati Team 2013 Presentation Video” on YouTube. Maybe it is because the team has been absent from the top of the time sheets for so long that Ducati thought we might have forgoten that Nicky Hayden and Andrea Dovizioso are the team’s factory riders. I kid, I kid…but really…no, I kid.

Already two practice sessions deep at Mugello for the Italian GP though, Ducati Corse is making quite the impression with all five of its riders: Hayden (4th), Iannone (6th), Dovizioso (7th), Pirro (10th), and Spies (16th). Mugello is Ducati’s home track event on the MotoGP calendar, and the 2013 Ducati Desmosedici GP13 has turned more than a few laps at the Tuscan circuit.

For Ducatisti, Sunday could be a very good day, though the weather remains a huge variable. But still, in the dry the Ducatis seem to be going very well, and for Ducati podiums, we all know you just add water. Chewy.

Mugello is arguably MotoGP’s crowning glory. The location is stunning, in the verdant hills of Tuscany, a few miles north of Florence, one of the most beautiful ancient cities in the world. The track itself is gorgeous and beautifully laid out, rolling round the valley in which the circuit is set.

It is one of the few tracks left at which a MotoGP bike can fully stretch its legs, even a 260+ horsepower fire-breathing 1000cc Honda RC213V. At the end of the front straight, as riders drift right then left for the slight kink of the pit lane exit just before the track drops off for the spectacular first corner at San Donato, the bikes approach the magical barrier of 350 km/h. An obstacle that has not yet been cleared, but one which must surely fall in the near future.

A lap of the circuit passes in under 1’48, an average of 175 km/h, or nearly 110 mph. It is verily a temple of speed.

It may seem odd, then, that the fastest bike does not necessarily win at the circuit. Of the past ten editions of the race, seven have been won by Yamahas, a bike which has never been the fastest in a straight line.

While speed is not the secret to the circuit, a glance at the list of winners over the years reveals exactly what is: Valentino Rossi has won seven times at the circuit in the premier class (as well as twice more in the support classes), Mick Doohan won here six times, Jorge Lorenzo won twice, and the list of one-time winners includes Dani Pedrosa, Kevin Schwantz, Loris Capirossi and Casey Stoner.

To win at Mugello is simple: it is merely a matter of being one of the very best riders in the world.