If you are looking for a quick and easy performance upgrade or just a reliabilty upgrade for your gy6 or qmb139 scooter. This is the answer. This Performance CDI box will change the timing curve of your engine and remove the stock rev limiter. This will result in more power and a higher top speed. Side note: upgrading your CDI box isnt going to be a night and day difference, however the quality and reliabilty of this CDI box will! This CDI box is an A/C cdi box. please be sure your scooter is build with a A/C cdi. D/C cdi boxes are much larger. Genrally a D/C cdi scooters headlights will turn on when the key is turned on without the engine running. This cdi will fit all 4 stroke scooters from 49cc -232cc with a qmb139 motor or a gy6 motor.
This will fit all:
gy6 engines (with a/c cdi)
qmb139 engines (with a/c cdi)
Genuine Buddy 125cc-150cc
Taotao 49cc-150cc (with a/c cdi)
SunL 49cc-150cc (with a/c cdi)
ALL chinese scooters 49cc-232cc (with a/c cdi)