If you're planning on using your GY6 powered scooter for urban trekking or get around town, you really don't need excessive top speed or ludicrous acceleration. You just need enough speed to keep cars off your tail and just enough acceleration not to look like you're riding with a load of bricks. A proper gear set will help you achieve the perfect spot.
Specifications:
GY6 125cc 152QMI
GY6 150cc 157QMJ
Transmissions Final Drive Gears
*13/40 (3.07 ratio) - Short 14/39 (2.78 ratio)
14/38 (2.71 ratio) 14/37 (2.64 ratio)
16/38 (2.38 ratio)
16/36 (2.25 ratio) - Long
*stock gears for most GY6 150cc
Designed and intended to be installed in GY6 150cc CVT Transmissions only!