The FZS V3 is a street-oriented motorcycle with a sporty design, and Yamaha typically focuses on providing accessories that enhance its performance and aesthetics rather than comfort features like a backrest.
These aftermarket backrests are designed to fit specific models and can be found through motorcycle accessory retailers or online marketplaces. If you are interested in adding a backrest to your FZS V3, it's recommended to research and contact local motorcycle accessory shops or check online platforms for compatible options.
Keep in mind that aftermarket accessories may require some modification or installation, so it's advisable to consult with a professional or experienced mechanic to ensure proper fitment and safety.