Using an 80/100-17 front tire instead of the recommended 100/80-17 tire size for your Yamaha FZS is not recommended. Here's why:
Fitment and Clearance: The tire size specifications are carefully selected by the manufacturer to ensure proper fitment and clearance within the motorcycle's design. Using a different tire size may result in improper fitment and clearance, potentially leading to issues like rubbing against the fender or other parts of the bike.
Handling and Stability: Changing the tire size can affect the handling and stability of the motorcycle. The recommended tire size is chosen to provide the optimal balance between grip, stability, and maneuverability. Using a different tire size may alter these characteristics and negatively impact the motorcycle's performance.
Speedometer and Odometer Accuracy: Changing the tire size can also affect the accuracy of your speedometer and odometer readings. Since the overall diameter of the tire changes with different sizes, it can lead to inaccurate speed and distance measurements, which can have legal and practical implications.
Safety Considerations: Motorcycle tires play a crucial role in maintaining traction, stability, and braking performance. Deviating from the recommended tire size can compromise these factors and potentially increase the risk of accidents or loss of control.
It's strongly advised to follow the manufacturer's recommendations regarding tire sizes for your specific motorcycle model. If you're looking to replace your tires, it's best to choose tires that match the original specifications or consult with a trusted mechanic or tire professional to ensure you select the appropriate size and type of tires for your Yamaha FZS.