If Aprilia, Ducati, Honda, KTM and Yamaha engineers are working to “completely revolutionise the concept” of MotoGP bikes, who will make the best job of this hugely complicated engineering process?
We don’t know yet. What we do know is that Dall’Igna has been MotoGP’s most creative engineer in recent years, but just because he was king of MotoGP’s wings and shapeshifter era doesn’t mean he will create the fastest 850.
We will get our first answer to the big 850 question when we see the new bikes in action for the first time, most likely during the post-Czech Grand Prix tests at Brno on Monday June 22.
Most MotoGP engineers agree the 850s will be very different and will improve the quality of racing, but certainly during the first year there’s a chance that one manufacturer will find a better answer to the new rules and leave everyone else behind.
“The risk is that there will be bigger gaps according to how successfully one manufacturer designs their new bike and how unsuccessful the others may be,” adds Albesiano.
The final iterations of the RC211V engine, shown to journalists during the 2006 Japanese Grand Prix at Motegi
Honda
This is exactly what happened in 2001, when Honda used its creativity and resources to build a motorcycle that was so much better than the others that it won all but three of the 32 races in 2002 and 2003.
And it happened again in 2007, when MotoGP moved from 990cc engines to 800s and Ducati’s latest Desmosedici was way faster than the opposition.
While Suzuki and Yamaha prepared for the start of the big four-stroke era by bolting 990cc four-stroke engines into modified RGV500 and YZR500 chassis, Honda took the chance to entirely reimagine how a MotoGP bike should be.
And that’s what MotoGP engineers should be doing right now – not merely adapting their thinking from 1000cc machines with big aero, ride-height devices and Michelin tyres to 850s with less aero, no ride-height devices and Pirelli tyres, but trying to create GP bikes that no one has even imagined, just like the RC211V.
The RC211V pointed the way to the aerodynamics innovations of 15 years later
For 2001 Honda built Valentino Rossi a new NSR500, codenamed NV4B (never mind the fact that the bike would be obsolete within a few months) while at the same time creating the RC211V.
The RC211V was a wondrous machine even though its engine internals were nothing radical. Indeed its bore and stroke, cylinder-head design and so on were essentially borrowed from the RC45 road bike, winner of the 1997 World Superbike title.
What was clever about the RC211V engine was its five-cylinder configuration.
First, Honda wanted to build a five because four- and five-cylinder machines were given the same minimum weight, because the lighter pistons of a five would allow them to pursue higher rpm in search of more horsepower.
The V4 was effectively two narrow-angle (75.5 degree) v-twins with a single in the middle. Honda used the fifth piston to balance the narrow-angle vees, which otherwise would’ve vibrated too much, killing horsepower.
Remember that vibration was one of the problems that convinced Aprilia to replace its 75-degree V4 RS-GP with a 90-degree V4 in 2020.
Rossi’s 2002 RC211V – the shallow main frame beams, with long engine hangers allowed lateral flex for sweeter cornering, without sacrificing the longitudinal rigidity required for braking
But why did Honda want to put a 75.5-degree vee in its RC211V? Because a narrow vee engine is shorter, allowing it to build a more compact motorcycle with a shorter wheelbase.
Also, mass centralisation was one of the 211’s main design mantras, because the more you concentrate a motorcycle’s mass around its centre, the better it will handle, steer and so on.
Shifting the fuel tank away from its traditional place at the top of the motorcycle to its centre was another major part of the mass centralisation process.
The RC211V carried much of its fuel below the seat, whereas the 500s had carried all their fuel above the engine. Lowering the fuel was a big help, especially in the early laps of races, when Honda calculated the RC11V could achieve 80 to 90% of full performance, whereas the NSR500 could only manage 70%. This was so important that all the manufacturers quickly copied the concept.