1. Wear of brake pads or discs Reason: The brake pads or rotors may be worn, reducing their ability to generate enough friction to stop the scooter. Verification : Visually inspect the brake pads and rotors for signs of excessive wear. Replace pads or discs if necessary.
2. Loose or damaged brake cables Reason: The brake cables may be loose, stretched or damaged, preventing effective transmission of braking force. Verification : Check the brake cable tension and make sure they are not frayed or broken. Adjust or replace cables if necessary.
3. Problem with the brake lever Reason: The brake lever may be damaged or not return to its original position properly, reducing braking force. Verification : Test the brake lever to ensure it returns properly after being released. Replace or repair the lever if necessary.
