Upgrading the motor involves replacing your existing one with a higher performance motor. If you're mechanically inclined, it may be something you can do yourself. You'll need to purchase a compatible motor with higher RPM or greater torque, depending on whether you're aiming for higher speed or more power for climbing hills. Additionally, you should verify that your current controller and batteries can handle the new motor's requirements. Would you like me to source a step-by-step guide or recommend professionals who can perform the upgrade?