The purpose of having two cables is to provide redundancy and ensure safety in case one of the cables fails. In such a system, one cable is responsible for opening the throttle to increase speed, while the other cable acts as a backup in case the primary cable malfunctions or gets stuck.
This dual-cable setup is more commonly found in larger motorcycles or high-performance bikes where precise throttle control is crucial. Having two cables enhances safety and allows the rider to maintain control of the motorcycle even if there is an issue with one of the cables.
If you have specific information about the R15 V3 having two accelerator cables, it could be a unique feature or modification specific to certain regions or editions of the motorcycle. It's always best to consult the official Yamaha documentation or contact a Yamaha dealer to get accurate and up-to-date information about the R15 V3's features.