Thomas Morsellino is a French freelance journalist and photographer, with keen eye for the technical details of MotoGP bikes. You may have seen some of his work on Twitter, where he runs the @Off_Bikes account. Peter Bom is a world championship winning former crew chief, with a deep and abiding knowledge of every aspect of motorcycle racing. Peter has worked with such riders as Cal Crutchlow, Danny Kent, and Stefan Bradl. After every race, MotoMatters.com will be publishing a selection of Tom's photos of MotoGP bikes, together with extensive technical explanations of the details by Peter Bom. MotoMatters.com subscribers will get access to the full resolution photos, which they can download and study in detail, and all of Peter's technical explanations of the photos. Readers who do not support the site will be limited to the 800x600 resolution photos, and an explanation of two photos.
Carbon swingarm on Pol Espargaro's KTM RC16
Peter Bom: Interesting to note that KTM's first attempt at a carbon swingarm gave an immediate improvement. At Aprilia, for example, we have seen a number of different prototype carbon swingarms, but the riders have so far always reverted to the aluminum items. Apart from the weight – Pol Espargaro says the bike is still around 5kg too heavy – carbon fiber has one major advantage as a material for a swingarm: you can modify stiffness in both force and direction just by changing layering, using the same mold. Producing a mold can be expensive, but because it can be reused to produce different swingarms, it is still an attractive proposition.
Load cell on the Ducati GP19, used for the quickshifter
Peter Bom: The red cylinder is a so-called load cell. It measures extremely precisely exactly how much pressure (in compression or tension) is being put through it. This information is used by the ECU to make changing gear up or down easier, by cutting the ignition once the load reaches a preset value as the rider presses the gear lever down or up. The sensors used in MotoGP have to be extremely precise, and most importantly, they have to provide stable output even when exposed to severe vibration and high temperatures. The bolt thread on a sensor like this broke on Fabio Quartararo's bike at Jerez, leaving him unable to change gear.
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