Dr. Pulley 18x14 Round Roller Weights for 125/150cc 4-stroke GY6 engines. Please select weight from drop-down menu. Dr. Pulley Round Roller Weights have exceptional durability, heat resistance and are low friction and low wear. Size: 18x14 Set of 6 Lasts longer than standard roller weights Excellent heat resistance Low friction / Low wear Please Note: Weight Color May Vary GY6 QMI/QMJ 152/157