GY6-50 rocker shaft with arms, 1).High quality,long life 2).Wearable and durable. ... scooter GY6-50, 4 stroke.Made of special steel material with Japanese technology, our rocker arm is a oil saving product, good ... , and wearable. 2 times life than others. GY6 rocker shaft with arms ,GY6-50 rocker shaft ...