Modifying a motorcycle's chain sprocket alone is not sufficient to significantly increase its top speed. The top speed of a motorcycle is influenced by various factors, including engine power, aerodynamics, gearing, and overall bike design. Changing the chain sprocket alone may have a minimal effect on the top speed, if any.
To achieve a higher top speed, you may need to consider a combination of modifications that improve the bike's overall performance. Here are a few factors you could look into:
Engine tuning: Optimize the engine performance by re-mapping the fuel injection system or installing a performance ECU (Engine Control Unit) to extract more power.
Aerodynamics: Enhance the bike's aerodynamics by installing a fairing or windscreen, which can reduce drag and improve high-speed stability.
Gearing: Adjusting the gear ratios can have an impact on the bike's acceleration and top speed. Installing a larger rear sprocket or a smaller front sprocket can provide higher top speed at the expense of acceleration. However, changing the sprocket sizes can affect the bike's overall performance and may require additional modifications, such as adjusting the chain length and rear wheel position.
Weight reduction: Reducing the bike's weight by replacing heavy components with lightweight alternatives can improve acceleration and top speed.
Tires: Upgrading to high-performance tires with better grip and stability at high speeds can enhance overall performance.
It's important to note that modifying your motorcycle can have consequences for safety, warranty, and legality. Always consult with a professional mechanic or tuner who specializes in your specific motorcycle model before making any modifications. They will be able to provide you with expert advice based on your bike's capabilities and the modifications you wish to make.