Pure manual measurement, the size data may have 2-3 mm error. For Yamaha For TRACER 9GT 2021-2025 Motorcycle Brake Clutch Levers. Mainly works on broken protection when the bike going to crash,it can fold up automatically to decrease the least the damage to your bike. Runs on the function of personal preference settings,you can adjust the length according to your preference,longer or shorter. Products can be installed and use without modification, easy to install., Manufacturer: SPAMFAFGHQ