NCY GY6 150 performance Pulley slider
The stock GY6 150 rear pulley slider, has a horrible angle, that commonly causes a serious bog in the midrange. This pulley has several angles to choose from, to aid with smoother acceleration in the midrange. We've used these on several bikes with awesome results. And for the money, you can't go wrong.
Will work for any Chinese GY6, Kymco 150cc, Buddy 125 / 150 / 170 etc with GY6 based engines.