DLH HIGH SPEED 150cc HIGH PERFORMANCE VARIATOR COMPLETE SET (1) VAIATOR (3) 10 GRAM ROLLERS (3) 11 GRAM ROLLERS (3) 12 GRAM ROLLERS (3) 1500 RPM SPRINGS FOR SCOOTERS WITH 125cc OR 150cc 4-STROKE GY6 MOTORS Directions for Use: Combine 2 sets of rollers in an alternating pattern, for example: 3 x 10g & 3 x 11g rollers (alternating weights in variator) gives you a 10.5g roller set. FITS MOST CHINESE SCOOTERS, ATVS, KARTS WITH 125cc &150cc GY6 MOTORS FITS TAOTAO, WOLF, ICE BEAR, JONWAY, JMSTAR, ROKETA, SUNL, TANK, PEACE, COUGAR, GATOR AND MANY OTHERS