YX110 125 Transmission Gear Box Main Counter Shaft For YX 110cc 125cc Pit Dirt Bikes This transmission gear box main counter shaft is designed for use with YX 110cc and 125cc pit dirt bikes.It serves as a core component of the drivetrain system, enabling smooth power transfer from the engine to the rear wheel.The shaft is engineered to fit compatible YX110 and YX125 models, supporting performance under standard operating conditions.It is suitable for replacement or repair of damaged or worn transmission parts.Installation requires standard mechanical tools and knowledge of motorcycle transmission systems.