Racing secondary transmission gear up kit 17T/36T +31% for SYM 125 A125Q2 GY6 125cc 150cc 152QMI 157QMJ 4-stroke Replacement parts

Performance Enhancement Design: This gear kit adopts a gear ratio combination of 17T and 36T, which can improve acceleration performance by 31% compared to the original configuration, making the motorcycle more rapid in starting and accelerating, suitable for racing and high-performance riding needs. Compatibility: Designed specifically for the SYM Super Duke 125 A125Q2 and multiple GY6 series 125cc and 150cc engines, ensuring compatibility with these models and facilitating users' modifications and upgrades Durable materials: The gears are made of high-strength alloy materials, which have excellent wear resistance and impact resistance, can withstand high load operation, extend service life, and ensure reliability under intense driving conditions. Optimize power transmission: Precise gear processing technology reduces friction losses, improves power transmission efficiency, and helps riders achieve better power response under different speeds and load conditions. Simple Installation: The gear lifting kit is designed with user convenience in mind, and the installation process is relatively simple, suitable for self replacement, saving time and cost, allowing riders to quickly experience the performance improvement.