Yamaha has filed patent forms for a seamless gearbox in its road bikes, which could point towards their introduction to Yamaha’s road-going machines in the future.
Seamless gearboxes have been the norm in MotoGP since 2011, when Honda debuted its first version of it. Yamaha took until the middle of 2013 to race a seamless gearbox of its own, by which time Ducati had already made the step itself. When Aprilia and Suzuki came back to MotoGP in 2015, the most notable difference between themselves and the established manufacturers was their lack of a seamless gearbox, and once they had developed their own systems, they were able to make up a lot of the deficit they had to the front runners.
However, although seamless boxes are now as commonplace in MotoGP as a four-cylinder engine, they have not yet made it to the road. Since aerodynamic winglets have been a feature on Ducati’s road bikes since 2019, that seamless gearboxes remain strictly a Grand Prix specialty says a lot about the complexity and financial expense it takes to engineer such technology.
However, that could be set to change, as Yamaha has patented its own seamless gearbox for road use, motorcycle reports.
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The benefits on the road include, as well as performance, stability, and the conservation of the rear tire, the option to have a semi-automatic gearbox. Motorrad suggests that an ‘automatic mode’ could be introduced on production bikes as a function of comfort. For long rides, this could be a positive, and if it is totally optional there is no negative for the ‘traditional’ rider. That makes it a consideration that a seamless box could be transplanted into touring bikes, as well as the sports bikes in Yamaha’s roster.
However, it must be said that the introduction of such technology is unlikely to be of benefit to the consumer’s pocket. Part of the reason seamless transmissions have remained only in GPs is because making them financially viable for the manufacturer is complicated. The engineering costs of a seamless transmission must therefore be balanced by a rise in the cost of the final product (ie the motorcycle found in the dealer). If Yamaha are to produce motorcycles with seamless gearboxes, they have either decided that there is a market for obscenely expensive sports bikes, or they have found a way to make them in a cost-effective manner.
Yamaha would not be the first manufacturer to try to bring a seamless transmission to a production bike. Ducati have patented their own system in 2021, but have yet to bring it to a production model. Whether Ducati or Yamaha are the first to bring a seamless transmission to the road is almost uninteresting. But what is interesting is to see how they do it, what benefits they have for road riders, and whether that benefit is reasonably affordable. Time will tell.