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The defense of Jorge Lorenzo’s MotoGP championship faces a further obstacle. In addition to having to fend off an unleashed Dani Pedrosa, and the rookie sensation that is Marc Marquez, the Yamaha Factory Racing rider now has to deal with a looming engine shortage as well.

Just six race weekends into the 2013 MotoGP season, and the factory Yamaha riders are already using the fourth of the five engines that they have for the entire season. With two thirds of the season left to go, the Yamaha men will face a serious challenge in making their engines last until the end of the season.

For the past couple of years, it has seemed as if there is some kind of unwritten law which states that any MotoGP weekend must be accompanied by rain. The weekends without the threat of rain or some other form of ill weather have been few and far between, so it is both a relief and a joy to come to Jerez, and have the prospect of a full weekend of stable and dry weather.

That’s not to say that no rain has fallen: this morning, as we walked to the car, we felt three or four large drops, but that was all. From the forecast, this looks like the entire quota of rain for the weekend, and the paddock is duly grateful for small mercies.

A consistently dry track still posed problems for the riders, however. The last time MotoGP was here, back in March, conditions were far from ideal. It rained, every day, with plenty of sunshine in between, leaving the track treacherous and difficult, with low grip levels and a patchy surface.

Though the teams collected plenty of data at that test, very little of it is usable this weekend, with much higher temperatures and better grip. Until the afternoon, that is, when the warmer temperatures meant that grip levels started to drop again, a perennial problem at Jerez. The bumps, too, are an issue, with many riders running wide after hitting them as they braked for the hairpins at the circuit.

In case you missed our exhaustive coverage of the Grand Prix of the Americas, those fools at Dorna gave me pit lane access this MotoGP season. So while the whole paddock waits for the Spaniards to come to their senses, I don’t plan on wasting the opportunity to share with our readers our extreme access to motorcycling’s premier racing class. Accordingly, here comes another installment into our ever-continuing “Up-Close” series, featuring the very finest Iwata has to offer: the Yamaha YZR-M1.

Over the past few seasons, Yamaha has managed the power-deficit created by the Honda and Ducati machines by having ballerina like handling. Truly at home only when the machine was tipped-over to the extreme, the edge-grip and handling of the Yamaha YZR-M1 has been its counterpoint in the ongoing MotoGP-design argument.

A true GP bike, in the sense that it requires a riding style that has been cultivated from years of 125cc & 250cc two-stroke racing, the flowing lines of the M1 on the race track have been a stark contrast to the harsh point-and-shoot styles seen more so on the Ducati Desmosedici, but also more recently on the Honda RC213V as well.

However now with HRC having developed a seamless gearbox for the RCV, the battle of Honda’s motor vs. Yamaha’s chassis has changed. Where Yamaha riders used to beg the Japanese factory for more horsepower (they still do, by the way), they know find themselves asking for parts to combat the Honda’s ability to get on the power while still at extreme angles — an attribute once reserved only for the Tuning Fork brand.

Thirty 2000px-wide photos are waiting for you after the jump.

Fresh on the heels of the news that Honda would continue to supply Moto2 with spec-engines through the 2015 season, Yamaha has confirmed that it will lease to MotoGP teams its YZR-M1 engine, on an annual basis, through the 2016 season.

Teams will then be free to develop their own bikes around the engine, or work with an independent chassis manufacturer to build a complete race bike.

The last of the factory MotoGP teams to unveil its 2013 livery (Ducati Corse, Pramac Ducati & Repsol Honda here), Yamaha Racing has finally officially debuted the 2013 Yamaha YZR-M1 race bike, along with the team livery for riders Valentino Rossi and Jorge Lorenzo.

Unlike his 2011 defense, Lorenzo will not rock the #1 plate, perhaps getting wind of the dreaded number’s propensity to kill its owner’s chance of a successful title defense. For Rossi fans, the return to Yamaha is surely a welcomed sight, with The Doctor’s neon yellow “46” working better with Yamaha’s blue and white paint scheme. Somethings just seem to go better together, right?

It is hard to believe, but it has been eight years since Valentino Rossi raced a Yamaha in liter capacity in MotoGP. Without even getting into the 800cc era that started in 2007 and ended in 2011, it is safe to say that a lot has changed since Rossi’s 2006 Yamaha YZR-M1 and the still unofficially debuted 2013 Yamaha YZR-M1.

While we already have a pretty good idea what was under the fairings of Rossi’s 2006 M1, since Yamaha Racing made detailed high-resolution pictures of the machine publicly available, what lies beneath the fairings of MotoGP’s current crop of prototypes is a closely guarded secret.

That secret must not have been guarded closely enough though, because the eagle eyes at GPone have gotten a photo of the Jorge Lorenzo’s M1 in the buff, and the Pride of Iwata has some interesting secrets to share with us.

Valentino-Rossi-Yamaha-M1-Sepang-MotoGP-test-livery-06

You can tell it is the off-season when the subject of what Valentino Rossi’s Yamaha YZR-M1 will look like is an instant buzzworthy item, and you know MotoGP fans have been pretty hard-up over the past few months when even the test livery creates a frothing at the mouth. Today is no different.

Allegedly itself, Valentino Rossi’s test livery for MotoGP’s first pre-season test at Sepang is already creating quite a stir on Twitter. There isn’t all that much different about the Sepang livery and the livery on the Yamaha M1 that Rossi tested last November in Valencia, except of course for the fact that Monster Energy has been added to the layout.

Valentino Rossi likes to refer to the Yamaha YZR-M1 race bike as “his” M1. Leaving Yamaha for Ducati, Rossi even wrote his M1 a “Dear John” goodbye letter, which many understood to be a message to former-teammate Jorge Lorenzo that the young Spaniard was riding on the coattails of the nine-time world champion. Burying the hatchet that once built a wall in the pit box, Rossi and Lorenzo are once again teammates, though the pecking order has changed to some degree within the factory Yamaha Racing team.

With Lorenzo the reigning World Champion, and Rossi coming off an abysmal two-year stint with Ducati Corse, for the first time in a long while, the Italian racer finds himself in the #2 seat. With some questioning whether the better days are behind him, there is even doubt coming from The Doctor’s own mouth about his ability. Sandbagging or true position, one can never be sure, but the issue is surely going to be one that is touched upon heavily in the beginning of the 2013 MotoGP World Championship.

With the winter ban nearly over, and riders returning to their racing duties, we won’t have long until we see bikes on the track testing. Until then, we have the marketing machines of the various factories for entertainment, and not to let Ducati steal the show with its 2013 Wrooom event, Yamaha has teased out some photos and a video of its 2013 team. Now, I am a huge fan of Gigi Soldano’s work, and I like to think I’m a pretty open-minded dude…but shit gets weird after the jump.

Here’s one for the Rossi fans, the first photo of Valentino Rossi on-board the 1,000cc Yamaha YZR-M1 at the Valencia test (snagged by Monster Yamaha Tech 3 mechanic Steve Blackburn).

Apparently, the weather is being less than co-operative in Spain, with sprinkles of rain being reported, but that didn’t stop The Doctor from getting on-board “his” bike.

After the jump, there are 17 photos of Rossi’s maiden voyage back on the Yamaha YZR-M1 — all courtesy of photographer extraordinaire, Scott Jones.

The battle for the future of MotoGP continues to gain intrigue, as Yamaha is reportedly considering leasing to private teams the motor found on the Yamaha YZR-M1. The news is being reported by MCN, which heralds the event as the end to the CRT experiment, and while that last part seems a bit hyperbolic, Yamaha’s move could have a profound affect on the series if it comes to fruition.

Currently on proposal for the 2013 MotoGP Championship is a grid comprised of 12 prototype machines (four from each of the three remaining factories), with the rest of the grid comprised of CRT entries (production motors in prototype chassis). That landscape could change however in 2014, as HRC has tipped that it has a production-racer, based off the Honda RC213V in the works, which it will sell to teams for around €1 million.

Adding yet another dimension to the bike line-up, Yamaha is said to be considering leasing the M1 motor to private teams, who in turn could use the prototype-based engine design in their own chassis design, much in the same manner that is currently being done with the production-based motors.

Debuting a three-cylinder concept at the INTERMOT show in Cologne, Yamaha is teasing the hypothesis of a tuning-fork brand triple with a crossplane crankshaft.

A technology that was developed in MotoGP for Yamaha YZR-M1, and then handed down to the Yamaha YZF-R1 in 2009, the unique qualities of the crossplane inline-four cylinder motor has been a key component to Yamaha’s potent, yet ridable machines.

Taking that same idea, and then applying it to a three-cylinder engine, Yamaha hopes to create a new motor that will appeal to street riders.