GY6 50cc scooter top end speed checked by radar !

I've currently switched out my stock 6 gram variator roller wieghts for Dr.pulley sliders of 5 grams after testing out I found out that I had lost like 10 mph of top end speed i went to light guys i will reinstall my original stock rollers and purchase another pair of DR. SLIDERS but of 6 gram wieght this time !😎👍