^^^ Yup. OEM, heavy steel rollers at higher RPMs stretch and deform the edges of the ramp plate, creating divots and "teeth" that bite and tear up the rollers. They also variate too quickly, causing you to bog down and crawl along like an embarrassed, helpless slug.
Look up the window notch method by Graham Motzing and the lighter, (8gm?) non-ferrous, white replacement rollers from Moped Factory. Use the over-sized brown version if you already over-notched ur variator.