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We just published a long story for our A&R Pro readers about the new rev limits in the WorldSBK Championship, and how the Ducati Panigale V4 R is ringing out to 16,500 RPM in the production racing class.

One of the ways that Borgo Panigale was able to bring such a high rev limit to its Desmosedici Stradale engine was through the use of lightweight titanium connecting rods. The red bikes are not alone on this, as the big go-fast change for the Kawasaki Ninja ZX-10RR is also titanium con rods, courtesy of Pankl.

Pound for pound stronger than steel, titanium has been helping raise the roof on rev limits for quite some time now…and maybe it is time to give another element on the periodic table a chance. Like say…carbon?

“There’s no replacement for displacement” in racing but what about power? In particular what about peak power and where a bike reaches it?

For WorldSBK purposes, the peak power of an engine is defined as the rev limit on the production machine, plus 3%.

Calculating this takes a little bit more math, as it requires you to average the rev limit from both the third and fourth gears, and then once this has been established, the FIM typically add an extra 3% to that RPM figure.

The rev limits are defined at the start of the championship season, but they aren’t set in stone for the duration of the championship. They can be changed at the discretion of organisers as the year progresses.

Having been introduced to much fanfare 12 months ago, the new limits are of interest again in 2019 because we have new bikes on the grid. The most newsworthy new machine is the headline grabbing Ducati Panigale V4 R, but it should be noted that  Kawasaki, BMW and Honda also have newly homologated bikes, and thus also new rev limits.

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The Kawasaki Ninja ZX-10R is getting an engine upgrade for the 2019 model year. As such, the 2019 Kawasaki Ninja ZX-10R as well as the Kawasaki Ninja ZX-10R SE will make an even 200hp at the crank, while the 2019 Kawasaki Ninja ZX-10RR will make 201hp.

Across all three models, the updated Ninja ZX-10R gets a revised cylinder head, which includes a finger-follower valve train that has 20% less mass than the previous tappet-style valves. This has allowed Kawasaki to use a more aggressive cam profile, accounting for much of the power gained, to the tune of 200hp at the crank.

On the 2019 Kawasaki Ninja ZX-10RR, things go a step further. The homologation special gets titanium connecting rods from Pankl, which drop nearly a pound (400 grams) from the inline-four engine’s internals. As a result of this weight reduction, the ZX-10RR sees its rev limit increase by 600 rpm over the previous model.

Indian’s heavyweight models aren’t really our cup of tea, though we do get an immature chuckle when we hear them talk about their “Thunder Stroke” engine platform. Childish jokes aside, some interesting news caught our eye about the American brand’s 2019 models.

Included as part of the 2019 Indian Chief, Springfield, and Roadmaster models is a number of new features, the most interesting of which is the inclusion of rear-cylinder deactivation.

We have seen this technology most recently in the World Superbike Championship (and it is no stranger in the land of four wheels), where manufacturers deactivate cylinders mid-corner to improve bike’s response during partial throttle applications.

Indian is using this concept in a different way though – one that will be more applicable to riding on the street.

Ever since Jerez, when the Red Bull KTM Factory Racing Team debuted a new engine with a counter-rotating crankshaft, fans and journalists have been asking when factory riders Pol Espargaro and Bradley Smith would be able to use the new engine on a race weekend.

KTM test rider Mika Kallio had been very positive about the engine during the Jerez weekend, and Smith and Espargaro had spoken in glowing terms about it after the Jerez test. 

KTM’s response was always that it would not be ready until at least after the summer break. Reversing the direction of crankshaft rotation is not as simple as sticking an intermediate gear between the crank and the clutch, to allow the crank to spin in the opposite direction while maintaining forward thrust.

Reversing the crankshaft means that the stresses in the engine are very different, and require careful testing to ensure it will operate reliably.

At Brno, it was evident that Bradley Smith finally had the new engine at his disposal. The difference is visible, if you look very carefully, from the torque reaction and other clues.

The Tokyo Motorcycle Show wrapped up this weekend, but the Mugen Shinden Nana isn’t the only surprise that the Japanese brand has in store for us. Mugen also debuted this interesting engine concept.

Mugen is pretty tight on details, but word out of Tokyo is that this is a 1,400cc, four-valve, air-cooled, push-rod motor design that Mugen is considering putting into production as a crate engine for bike builders, with a delivery date somewhere in 2020. 

Apparently today is Ducati Day, as news continues to come from Italy about the Ducati Panigale V4 and its Desmosedici Stradale engine.

Ducati has already spilled the beans on the new 210hp V4 engine it has been developing for its next superbike, but now we also get more spy photos of the Panigale V4 that will carry it.

These latest spy photos show quite clearly the 2018 Ducati Panigale V4 that will debut later this November, at the EICMA show in Milan.

Ducati CEO Claudio Domenicali confirmed the Panigale V4 name today, and for our A&R Pro members, we have gone into a lengthy analysis as to why Ducati is choosing to keep the styling and name of this machine so similar to the previous model.

In case you missed it, the Ducati Desmosedici Stradale engine debuted today at Misano. The 1,103cc 90° V4 engine with desmodromic valves makes 210hp and 88.5 lbs•ft of torque.

One of the core elements of the Desmosedici Stradale engine is its 70° crank pin offset, which creates a “Twin Pulse” firing order (0-90-290-380), which should make the road-going engine behave similar to a v-twin engine.

We don’t have to speculate too much though, as Ducati has a video of the Desmosedici Stradale bench testing a simulated run of the Panigale V4 around Mugello. Enjoy!

Hello and welcome to a new era of Ducati motorcycles, which is starting with a very special engine. Named the Desmosedici Stradale, this road-going version of the company’s MotoGP power plant is what is going to power Ducati’s next superbike, the Ducati Panigale V4.

Debuting today in Misano, at a special event ahead of the San Marino GP, the mystery around the Desmosedici Stradale engine has finally be revealed, to the tune of 210hp (@ 13,000 rpm) and 88.5 lbs•ft of torque (@ 12,250 rpm).

Dropping details on the 90° V4 engine with desmodromic valves, we now know that Ducati will continue to play the displacement game with its superbike, as the street version of the Panigale V4 coming with a 1,103cc displacement.

In 2019 however, Ducati will release its “R” spec machine, which will have a 1,000cc displacement, in order to homologation compliant for the World Superbike Championship and other national series.

In one week’s time, Ducati will unveil its new V4 engine, which will power the next-generation of the Italian company’s superbikes and other high-powered motorcycles.

Set to debut the Thursday before the San Marino GP round for MotoGP, Ducati has begun teasing us some information, the first of which is the new motor’s name, the Desmosedici Stradale.

True to Ducati naming conventions, the name of the engine literally means what it is, a road-going version of the Desmosedici engine that powers Bologna’s MotoGP project.

If you’re in the market for a BMW HP4 Race – the carbon fiber clad superbike from Bavaria – the $78,000 price tag might not be all that you’re spending on, as BMW Motorrad has a few items in the fine print that you might want to be aware of – the first being the engine life.

According to documents sent to BMW Motorrad dealers in the United States, the 212hp inline-four engine for the BMW HP4 Race comes with an expiration point of 5,000km (roughly 3,100 miles), at which point the entire engine will have to be replaced. Yup, you read that right.