If you are looking to improve the performance of your GY6 150cc engine, this is a super easy solution. Lighter sliders raise the overall engine rpm. Dr. Pulley sliders are much better than rollers. Simply put, you will get a lot more action out of your variator, resulting in more power. We've found that 11G is great for riders under 200lbs and 10G for riders 200lbs. Otherwise, grab a variator tuning kit for fine tuning and get the weight that works best for you.
