NCY Roller Weights (18 x 14); GY6, Genuine

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NCY’s Roller Weights are the best way to dial in the CVT transmission on your Genuine Buddy 125cc-170cc, Blur, or 157QMJ GY6 engine to suit your driving style. Lower your stock weight (12g-14g) with 10g or 11g for a great performance upgrade or when replacing worn out stock weights.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!
Specifications:
1 set of 6 rollers 
18×14 rollers
Weights available from 8g to 13g
Combining 2 sets of rollers lets you tune your transmission to suit your driving style (lighter weights = higher RPMs, heavier weights = lower RPMs)
For example, using 3x 10g and 3x 11g rollers (alternating weights in variator) gives you 10.5g roller set.DANGER: Weights must be installed in an alternating pattern (120 degree angle). Otherwise, YOU WILL SEVERELY DAMAGE YOUR ENGINE!Compatibility: This product works with the bikes listed below and engines with the following engine codes.
Genuine Buddy 125
Genuine Buddy 150
Genuine Buddy 170
Genuine Blur 150
Genuine Blur 220
157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:
157QMJ
161QMK
152QMI
1P61QMK
YN1P57QMJ
1P52FMI
154FMI
JJ157QMJ
1P57QMJ
BN157QMJ
BN161QMK-A
Other QMJ, QMK, and QMI models
Don’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.About NCY: NCY is the aftermarket performance parts leader for most popular scooter brands including Compatible with Honda, Compatible with Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 / QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.Made in Taiwan.This product is intended for off-road use only.This product is not intended for use on public roads or land.*Performance upgrades are considered racing parts and are not covered by warranty.