38mm opening for carb. Uni Filters are top of the line for scooter air filters.
The dual layer UNI Filter keeps back pressure for gas intake to a high level keeping the scooter running well. If you have problems with getting gas into carb this filter is correct one and will help.
Fits on carb on 139QMB engine plus many others needing 36mm-39mm opening for an high performance upgrade for air filter. Filter is angled for easy fit. Just the best air filter upgrade you can do for the 139QMB 50cc GY6 engine.
When changing to larger jets to take advantage of other mods this Uni Filter gets the job done.
This engine (139QMB) is used in scooters from Kymco, Diamo, Schwinn, Q Link Geely, Roketa, Tank, Avanti, Meitian, Strada Verucci Pep boys and most 50cc four stroke scooters plus many others made in China.
48 Lower States Only