There isn't a specific height requirement for purchasing a Suzuki GSX-S750 or any motorcycle for that matter. However, height can play a role in determining how comfortable you feel and how well you can handle the bike.
The Suzuki GSX-S750 has a seat height of approximately 820 mm (32.3 inches). This seat height may be manageable for riders of various heights, but it's always recommended to sit on the bike and test it out for yourself to ensure you feel comfortable and can reach the ground easily with both feet.
As a new rider, it's important to consider factors beyond just height. Factors such as your riding experience, confidence, and physical strength should also be taken into account. If you're new to motorcycling, it might be beneficial to start with a smaller, more beginner-friendly bike and gradually work your way up as you gain experience and confidence.
Additionally, you can consider getting a motorcycle that offers adjustable suspension or has a lower seat height option if you're concerned about height. These features can help tailor the bike to your comfort and provide a better riding experience.
Ultimately, it's recommended that you visit a Suzuki dealership or any motorcycle dealer to sit on the Suzuki GSX-S750 and see how it feels to you. It's essential to find a motorcycle that fits your body type and allows you to comfortably reach the controls and support the bike while stopped.