While The KTM RC 200 is a sporty motorcycle with a seat height of approximately 32.3 inches (820 mm). Your height of 5'4" (162.5 cm) might make it a bit challenging to plant both feet firmly on the ground while seated.
Factors such as your inseam length, riding experience, and comfort level may also influence your ability to handle a motorcycle with a higher seat height.
If possible, it's recommended to visit a KTM dealership and request a test ride on the RC 200 to assess how well you can handle the bike and if you feel comfortable and in control. Additionally, consider wearing appropriate riding gear, including riding boots with a thicker sole, which can add a few extra centimeters to your reach.
Ultimately, it's crucial to prioritize your safety and comfort while riding, so make sure to choose a motorcycle that allows you to comfortably reach the ground and maintain control of the bike at all times.