This will fit ALL Yamaha based 50cc horizontal 2 stroke engine with 15X12 size rollers.
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!
Choose from 3g, 4g, 5g, 6g, 7g, 8g, 9g, 10g and 11g from the drop down box.
