Torque Spring 50Cc GY6

contra spring for GY6 4-stroke scooters Torque spring for 4-stroke Chinese scooters 50cc with GY6 engine. Selecting the right torque spring A spring with a hardness that differs from the original is definitely useful for tuned vehicles and when experiencing problems with a slipping belt. For optimum acceleration it is important to choose the right spring: A spring that is too soft compromises acceleration, while a spring that is too hard reduces top speed as it counteracts the CVT weights with too much pressure. Specifications Contra spring GY6: Color: Black Dimensions: 57.5 x 88 mm Wire diameter: 4 mm