NCY [10 gram set] Variator Roller Weights (18 x 14) for GY6 and Genuine Scooters NCY Great quality roller weights for scooters using GY6 150 engine in scooters and go carts. Lower your stock weight (12-14) with 10s or 11s for a great performance upgrade for better take and just plain replacing worn out stock weights. 18X14 mm roller set for Buddy 125, Blur, and many other scooters. Buddy 125 takes 11.5g stock rollers, and Blur takes 14g stock, so play with some different weights and make it rip! For those of you unfamiliar with roller weights, they are an important tuning device and have a significant impact on your scooter's performance! They should be checked/changed every 1000 miles (per maintenance schedule) to keep your scooter running tops. Over time, roller weights will develop flat spots which will impair the performance of your scooter. A good indication that your rollers are worn is increasingly high revs for a given speed and/or decreased top speed. Replacing worn rollers with this set will restore and actually improve your low-end power and especially your top speed. Fuel efficiency will also improve dramatically!