Changing the rear tire size of your Yamaha FZS 150 from the stock size to 150/60 can have some effects on the bike's performance and handling characteristics. Here are a few considerations:
Increased Tire Width: A 150/60 rear tire is wider than the stock tire, which means it will have a larger contact patch with the road. This can potentially provide improved traction and stability, especially during cornering.
Altered Handling: The wider tire may slightly affect the bike's handling characteristics. It can make the steering feel slightly heavier and impact the bike's agility, as it will require more effort to initiate and maintain lean angles. This change in handling may or may not be desirable, depending on your personal riding preferences.
Speedometer Accuracy: Changing the rear tire size can affect the accuracy of the speedometer. A larger rear tire will cover more ground with each revolution, potentially causing the speedometer to display a lower speed than the actual value. This can be adjusted by recalibrating the speedometer or using GPS-based speedometers for accurate readings.
Suspension Adjustments: When changing tire sizes, it's important to consider the clearance between the tire and the swingarm, as well as the overall suspension setup. A wider tire may require adjustments to the suspension to ensure proper clearance and maintain optimal performance.
Fuel Efficiency: A wider tire can slightly increase rolling resistance, which may have a minor impact on fuel efficiency. However, the effect is generally minimal and may not be noticeable in day-to-day riding.
It's important to note that modifying the tire size of a motorcycle can have implications on the bike's warranty, handling characteristics, and safety. It is recommended to consult with a professional mechanic or contact the manufacturer for guidance specific to your Yamaha FZS 150 model before making any modifications.