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Saturday at Motegi had offered the mouthwatering prospect of the battle we have been waiting for all year. Valentino Rossi had cracked his qualifying jinx and lined up on the grid next to Jorge Lorenzo.

The pair were close in qualifying times and in race pace, and with 14 points separating them in the championship, there was a lot at stake. Finally, we might get to see Rossi and Lorenzo go head to head in the struggle for supremacy, and to seize the momentum in the MotoGP title race.

As has so often been the case, the hopes of the fans withered on the vine on race day. The rain wrecked any chance of a straight and open battle between the two protagonists in the title chase, throwing the day’s schedule into disarray, and turning what could have been an all-out war into a cagey battle of tactics.

We may not have been given what we hoped for, but there was still plenty for the fans to get their teeth into. Jorge Lorenzo looked to have the race sewn up by the halfway mark, but a slowly drying track blew the race wide open.

There were very few direct battles, at least not up front, but an increasingly dry line radically changed the dynamic of the race. There was tension, there were surprises, myths, and shibboleths were shattered.

The championship took on a new impetus, and the strain of the fight going down to the line started to take its toll. This is going to be a tough year for the men who would be champion.

The day after an intense race at the Motorland Aragon circuit, MotoGP held its first full Michelin tire test since Sepang this year. The track was open to any teams wishing to give the Michelin tires a spin, or work on the setting of their bikes.

Fourteen riders elected to make use of the opportunity, including both Repsol Honda riders, the Tech 3 Yamaha duo, both LCR Honda riders, and the Aprilia men, along with Scott Redding, Aleix Espargaro, Danilo Petrucci and Valentino Rossi.

Michelin had brought three rear tires and four front tires to Aragon, keen to get some data from the circuit, as they have not had much testing at the track, and very little in the dry.

The 2015 MotoGP championship is one of the closest in years. Close championships are always fascinating, but this one has an extra edge to it: the two men fighting over the 2015 title are both teammates, and racing on the same bike.

The differences between the Yamaha M1s of Valentino Rossi and Jorge Lorenzo are virtually non-existent, their results depend entirely on the riders themselves, and how well their teams prepare the bikes and riders for the race. With nothing to choose between the bikes, focus has turned to the tires.

Jorge Lorenzo’s constant references to his preference for the tire with the special edge treatment have made this focus much keener.

Under the glaring spotlight of public scrutiny, the allocation of tires which Bridgestone brings to each race has taken on the appearance of being the decisive factor in every race.

The post-race Michelin tests have been something of a frustration for journalists following MotoGP. With riders barred from speaking publicly about the tires, and no official timing for the tests, it has been hard to make sense of the events.

Today’s Brno test was even more frustrating. Rain all day, alternating between heavy downpours and a very light drizzle meant that the track was more or less wet all day. The riders stayed in their garages and race trucks, for the most part, with a handful of riders putting in a handful of laps.

Though the test was mostly a washout for Michelin, the French tire manufacturer did get some useful data from the test. Riders went out on three types of tire: slicks, wets, and intermediates, in varying conditions.

The entertainment value in MotoGP waxes and wanes through the years. One year, the races are all serial snoozers, each race settling into a procession a lap or two after the start. The next, everything is turned on its head, every race a tense battle to the line for a close finish. We are lucky indeed that this year falls very much into the latter category.

There have been some classic races already, and tomorrow’s race looks like being an absolute corker. The two title favorites and the most highly-tipped outsider are on the front row of the grid, two fast Ducatis and the best satellite rider at the moment are behind them on the second row, and one of the most exciting young talents in MotoGP will start from seventh, and is clearly competitive.

Battle tomorrow is not just for victory, but for the momentum in the championship. And if the racing needed spicing up any more than it has been already, it might just rain.

The weather put the cat among the pigeons at Brno on Friday. Hot weather, track temperatures of over 50°C and a bumpy track pushed the riders and their tires to the limit, and the afternoon session of MotoGP turned into a proper crashfest.

Valentino Rossi was the first to go down, followed a second later by Dani Pedrosa, but what caused those two to crash had nothing to do with the weather conditions.

A leaking fork seal dribbled oil onto Dani Pedrosa’s brakes, causing a mist of oily smoke to trail behind Pedrosa, onto the rear wheel of his Honda RC213V and the front wheel of Valentino Rossi’s Yamaha M1. Rossi lost the front and crashed at Turn 13, Pedrosa was highsided off his bike at Turn 14.

Rossi walked away unhurt, Pedrosa slammed his left foot into the ground, aggravating an old injury suffered in Australia in 2003.

It was a hectic trip across the Atlantic for many in the MotoGP paddock. The air at Brno was thick with tales of airport-based woe, of overbooked flights, bad weather delays, missed transfers, and lost luggage.

Despite the supposed privilege of platinum frequent flyer status – one of the side benefits of working for a MotoGP team is you rack up a lot of air miles – the staff of one MotoGP team were stuck in one airport for over 24 hours, thrown out of the airport lounge and unable to leave.

Chicago O’Hare was temporarily transformed into the motorcycle racing equivalent of purgatory: large numbers of riders, mechanics, and other staff kicking their heels with nothing to do.

That is especially tough on riders: most of them suffer from some form of hyperactivity or another. Few can sit still, and most are very outdoor types. L’enfer, c’est les aéroports, if you will forgive me paraphrasing Sartre.

But there was an overwhelming sense of contentment at being in Brno. The track is much loved, even among those who do not go particularly well here. It is wide, fast, and flowing, and allows the riders to play with the lines. Dani Pedrosa, who has won here twice in MotoGP, explained why he liked the track.

“It’s wide, and the corners are with a nice shape, so you can be precise,” Pedrosa told us. “It’s a track that demands that you are precise, and I like this. Also, you can try many things, one centimeter more out, one centimeter more in, later, deeper, or earlier. This gives you a gain to be able to adjust your riding lap by lap, and some tracks are just one line and one pace and you cannot change. Here you can play a little bit more and that’s positive. I like it.”

The Sachsenring treated us to its usual surprises on Thursday, with rain and squally winds blowing through the paddock in the morning, and the sun coming out as the day went on.

Fortunately, the only people out on track were the riders doing reconnaissance laps on the scooters, and safety officers cutting fast laps during their usual pre-weekend track inspection.

As an observer, it is hard to tell the difference between a circuit safety inspection and hooning round the track in one of the many high-end BMW sports cars that the German car-maker provides to Dorna, but I’m sure that as ex-racers, both Loris Capirossi and Franco Uncini know what they are doing.

Weird weather has already had its effect on the tire allocation. Originally, Bridgestone had brought three specifications of front tire, the soft to deal with the cold mornings, the medium to deal with the warmer afternoons, and the asymmetric tire with soft rubber on the right and a compound closer to the medium on the left, to handle the wind gusting to cool the right side of the tire.

Jeremy Burgess was famous for finding that special something on Sunday morning that gave Valentino Rossi the edge in the race in the afternoon. It is a tradition carried on by Silvano Galbusera, who has replaced Burgess since the start of the 2014 season.

Galbusera, too, always seems to find that extra little tweak during warm-up that makes the difference between cruising in fourth or finishing on the podium, and even on the top step.

The fact that it has continued since Burgess’ departure suggests that the tweaks were very much a collaborative effort, with input coming from his data engineers and mechanics, as well as the rider himself, of course.

Two weeks ago in Barcelona, Rossi’s team appear to have found something extra special. For it did not just work on the Sunday in Catalonia, taking Rossi from the third row all the way up to 2nd, but it has even carried through to Assen, some 1600km further north.

If the Honda is so bad, why are two RC213Vs at the top of the timesheets? That seems like a very valid question, given the public struggles that all of the Honda riders have had with the bike this year. Has the 2014 chassis finally fixed the Honda’s ailments? Is Márquez back?

If only it were that simple. Firstly, of course, Marc Márquez never went away. The double world champion still possesses a gargantuan talent, and the desire and will to use it. He was hampered by many aspects of the 2015 bike, including both the engine and the chassis.

The 2015 chassis, he explained at Assen, was more precise and could be used more accurately. Unfortunately, the only way to get the best out of it was to ride it like every lap was a qualifying lap. That level of intensity is just not sustainable over race distance.

At some point, you will make a mistake, and the 2015 chassis punishes mistakes mercilessly. So HRC have reverted to a hybrid version, using a 2014 chassis and the new swingarm which Márquez first tested at Le Mans.

What did we learn from Friday practice at Barcelona? We learned that things are not quite what they seem. Does the fact that the Repsol Honda riders are second and third overall mean that HRC’s travails are behind it? Certainly not.

Do the two Suzukis in the top five – and Aleix Espargaro setting the fastest overall time – mean Suzuki have found the horsepower to match the Honda and Ducati? Absolutely not.

Will the Yamaha’s lowly positions on the grid put them out of contention on Sunday? Leaving aside the fact that it’s just the first day of practice, with another full day on Saturday, definitely, absolutely, certainly not.

Are all these assumptions completely baseless? That’s where it gets interesting. In fact, there is a kernel of truth underlying them all.